WO2006080403A1

WO2006080403A1 - Communication device, communication system, communication method, communication program, and communication circuit

Info

Publication number: WO2006080403A1
Application number: PCT/JP2006/301238
Authority: WO
Inventors: Koji Sakai; Hitoshi Naoe; Fumihiro Fukae; Shohei Osawa
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2005-01-28
Filing date: 2006-01-26
Publication date: 2006-08-03

Abstract

In a transmitter (2001), upon generation of each transmission frame having no window size limit, a batch-mode transmission final flag generation circuit (2004) assigns a batch-mode transmission final flag to each transmission frame and a serial number generation circuit (2005) assigns a serial number to each transmission frame. In a receiver, the serial number of the frame received from the transmitter (2001) is analyzed and if a serial number is skipped, retransmission is performed upon reception of a frame having the batch-mode transmission final flag indicating that it is the end. Thus, retransmission can be performed in data transmission using a UI frame, thereby improving the communication efficiency.

Description

Specification

Communication device, communication system, communication method, communication program, communication circuit

The present invention relates to a communication device, a communication system, a communication method, a communication program, and a communication circuit that transmit and receive data.

Background art

[0002] In recent years, infrared communication systems have mainly used portable personal terminals such as portable telephones, notebook personal computers, electronic notebooks, etc., or electronic devices suitable for these portable devices, or desktop personal computers and infrared rays. It is widely used to exchange data with compatible printers.

[0003] As a communication system in an infrared communication system, the power of IrDA (Infrared Data Association) system, ASK system, etc. can be mentioned IrDA system is a communication system for high-speed, high-efficiency transmission mainly between computers. It is a communication protocol defined for infrared communication based on a certain HDLC communication system, and is widely used as a general one.

[0004] In addition, in data transmission in a computer etc., it is common to use packet exchange to transmit and receive packets consisting of data of a certain size and information indicating serial numbers given before and after it, addresses, etc. Packets used in HDLC and IrDA communication systems are called frames and are managed by the IrLAP layer.

[0005] A frame also includes fields of address (A), control (C), information (I), and FCS, and flag powers given before and after, and for information (data) transfer. There are I (Information) frames used, S (Supervisory) frames for supervisory control of communication, and U (Unnumbered) frames used for data communication without connection, disconnection, and retransmission in communication.

[0006] Usually, since data to be transmitted can not be transmitted in one frame in many cases, it is divided into a plurality of frames (I frame or UI frame) and transmitted. I-frames have data to be transmitted in the I (Information) field, and have a serial number used for checking for missing data to realize highly reliable communication. UI frame is used to transmit data Force on the field There is no serial number used to check for missing data.

The S frame is configured to have no I field for holding data, and is used to transmit reception preparation completion, a busy state, a retransmission request, and the like. U-frames are called unnumbered frames because they do not have numbers like I-frames, and are used to set communication modes, report responses, report abnormal conditions, and establish or disconnect data links.

As described above, the IrDA communication method is based on the HDLC communication method. Generally, as a communication method, a full-duplex communication method capable of simultaneously performing transmission and reception and a half-duplex communication method not simultaneously performing In the case of the double communication method and the half duplex communication method, it is necessary to define a signal for switching between transmission and reception.

[0009] In the case of a force IrDA communication system in which the full-duplex system can also be adopted in the HDLC system, infrared light of base band modulation that propagates over free space is used for data transmission, and two are within the communication range. If these stations transmit simultaneously, infrared interference will occur and normal communication can not be performed.

[0010] Therefore, in the IrDA communication method, infrared rays do not exist in the communication area before establishing the communication link, and transmission is performed only when the communication link is established, and communication is performed after the communication link is established. It uses a half-duplex scheme in which transmission rights are periodically exchanged between the two.

[0011] FIG. 19 shows how to establish a communication link in IrDA. In IrDA, the connection of the link layer (LAP layer) is established when the primary station transmits an SNRM command and the secondary station responds with a UA response. In the SNRM command and UA response, various parameters (data transfer rate, maximum data length, etc.) at the time of data transfer are arranged, and it is possible to mutually know the communication parameters of the opposite station, and the most efficient communication parameter. Data will be transferred.

[0012] FIG. 9 is a block diagram for explaining an application of an effective communication system. In the HDLC communication system and the IrDA communication system, those performing transmission or reception are called "stations", and generally, a primary station performing data link control for controlling communication and a secondary station under control of the primary station Communication is performed by transmitting and receiving the above frame as a command (primary station → secondary station) and a response (secondary station → primary station). The power system is called an unbalanced communication system. As illustrated, computers, mobile phones, electronic organizers, etc., TVs etc. function as stations in communication, Data exchange is performed using infrared rays as a transmission medium.

FIG. 10 is a signal sequence diagram for illustrating a general procedure using an I frame in these communication methods. Here, a case is shown where data divided into a plurality of I frames is transmitted from station A as the primary station to station B as the secondary station. Note that the window size at this time (the number of I-frames that can be transmitted at one time without interruption) is 3.

First, station A assigns numbers “0”, “1”, and “2” as I frames to each frame corresponding to data to be transmitted, and transmits them. When transmitting a frame with serial number “0” “1”, transmit with PZF (Pole / Final) bit set to 0 in order not to transfer the transmission right to the secondary station. Also, when transmitting a frame with serial number “2”, transmit with the P / F bit set to 1 in order to transfer the transmission right to the secondary station.

Station B, which has received the frames with serial numbers “0”, “1”, and “2”, respectively, has successfully received each frame, and after receiving the frame with serial number “2”, the PZF bit is 1. A frame given the number "3" following "2" is returned as a response frame, and the message "transmit the third data" is transmitted. This response frame is an RR frame and! /, S frame. When the secondary station transmits an RR frame, the PZF bit is set to 1 again to transfer the transmission right to the primary station.

[0016] Station A confirms the response from station B, transmits from the third data again with a serial number of "3" "4" "5" and transmits. By repeating this procedure as necessary, the accuracy of multi-frame communication can be improved. If an error or missing data is detected at station B, an RR frame is transmitted with the data number desired to be retransmitted, and station A retransmits by re-sending from the desired data number. It becomes possible.

[0017] In data transfer using I frames, the number of frames that the primary station can transmit at one time is limited by the window size, and the maximum is 7 in IrLAP's IrLAPdnfrared Link Access Protocol (Ver. 1). There is. For this reason, when performing a large amount of data transfer, the response frame from the secondary station is transmitted for each window size, which causes poor communication efficiency in a communication situation where there are no errors. Become.

FIG. 11 is a signal sequence diagram for illustrating a general procedure using UI frames in these communication methods. Here, it is divided into multiple UI frames from station A to station B Indicate if you want to send out the data! In the case of data transfer using a UI frame, since the window size is not limited, station A can transmit frames continuously for the maximum turnaround time. When the maximum turnaround time for station A has elapsed, it sends an RR frame to the secondary station to transfer the transmission right.

The maximum turnaround time is the time when one station can maintain the transmission right, and after the transmission right is transferred to the other station, the response from the other station will be received even if the maximum turnaround time of the other station has elapsed. If not, the station that has transmitted the transmission right transfer frame can know to the other station that the frame for transmission right transfer has been delivered. The maximum turnaround time of the partner station can be known by parameter exchange at connection establishment. In IrLAP, a turnaround time of up to 500 ms is defined.

If there is no transmission data transfer request in the own station, station B to which the transmission right has been transferred by the RR frame is transmitted to the primary station by setting the P / F bit to 1 and transmitting the RR frame. Delegate the right.

[0021] In data transfer using UI frame, retransmission is not performed in the case of using I frame, but in the situation where the quality of the channel is good and no error occurs, the time of up to 5 OOms as described above Station A can transmit continuous frames, which leads to improvement of communication efficiency.

[0022] Fig. 18 shows the standard IrDA protocol stack. IrDA's protocol stack includes IrPHY, drDA Physical Layer (IrPHY) that defines modulation method, signal strength, directivity, etc., error control function according to general purpose High Level Data Link Control (HD LC), transparent transmission, and flow control. In addition, IrLAP (IrDA Lin Access Protocol), TCP / IP (IrDA Lin Access Protocol), which defines the function of negotiating the communication speed and maximum data size with each other prior to communication, and the procedure for searching for and finding unspecified external devices to connect Transmission Control Protocol / Internet Protocol) Provides a function of multiplexing and demultiplexing that corresponds to the port numbers used in TCP and UDP. IrLMP (IrDA Link Management Protocol), for performing flow control on individual logical links Tiny TP (Transport Protocol), which consists of OBE X (OBject EXchange protocol), which is a communication protocol for object exchange in data transmission / reception or data communication. . In the OBEX, a device requesting a command is called a client device, and a device returning a response in response to the request is called a server device. Usually, the client device issues a request command such as Put ZGet to the server device, and the Sano device returns a response command according to the client Z server model.

The request commands defined in OBEX generally include the following. Connect with communication partner Z Disconnect CONNECTZ DISCONNECT Send object such as file send Z Receive PUTZ GET Receive path change server device receive destination path (current path) SET PATH Send object receive or send There is a forced A BORT.

FIG. 20 illustrates the basic exchange of request command Z response commands between the client device and the server device. When receiving an object exchange request from the user, the client device sends a CONNECT command meaning a connection request to the server device to establish a connection with the server device.

The server device having received the CONNECT command returns a SUCCESS response command to the client device if the connection is possible, and the client device receives the SUCCE SS response command, whereby the client device is received. A connection is established between server devices.

After establishing the connection, the client device starts exchanging objects, and transmits a PUT command for transmitting the object to the Sano device. When the Sano device successfully receives the PUT command from the client device, it returns a CONTINUE response command, and the client device receives that the server device receives a CONTINUE response command, and the server device successfully receives the PUT command. After confirmation, send the next PUT command. The client device sends PUT commands until all objects have been sent. When the server device has successfully received the last PUT (Final) command, it sends a SU CCESS response command back to the client device.

After receiving the SUCCESS response command from the Sano device, the client device sends a DISCONNECT command, which means a disconnection request, to the server device to perform disconnection processing with the server device. The server device having received the DISCONNECT command returns a response command of SUCCESS indicating permission of disconnection to the client device, and the client device receives the response command of SUCCE SS. Connection between the client devices is disconnected, and object exchange between a series of client devices and server devices is completed

As described above, in the OBEX, the server device exchanges an object by returning a response command to the client device request command.

In addition, in the communication protocol having a hierarchical structure such as OSI as in the IrD A protocol stack described above, header information is defined for each layer independently of the other layers, and between the computing devices. Header data is sequentially added to each layer from the highest layer to the lowest layer to the data to be originally transferred.

Also, for received data, header information is sequentially removed in each layer from the lowest layer to the highest layer, and data is passed to the upper layer.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 10-308791 (publication date: 1998)

November 17) "

In the above-mentioned conventional configuration, however, the data transfer using the UI frame has a good communication path quality and no error occurs. In such a situation, the time up to 500 ms as described above, It is possible to perform continuous frame transmission, which leads to an improvement in communication efficiency, but when the quality of the communication path is not so good, it can not be retransmitted as in the case of using I frame. However, there is a problem that the communication efficiency is bad.

In addition, conventional IrDA does not support data transfer in one-way communication that does not require a response.

Disclosure of the invention

An object of the present invention is to provide a communication device, a communication system, a communication method, a communication program, and a communication circuit capable of performing retransmission of a frame in data transfer.

[0036] In order to achieve the above object, the communication device according to the present invention collectively transmits data without transferring the transmission right according to a communication method in which the number of frames that can be transmitted at one time is not limited. A communication device that divides batch transmission data to be transmitted collectively and generates transmission frames A transmission frame generation unit (transmission frame generation circuit, transmission frame generation means), a serial number generation unit (serial number generation circuit, serial number generation means) for assigning a serial number to the transmission frame, and the final of the batch transmission data. A batch transmission final flag generation unit (batch transmission final flag generation circuit, batch transmission final flag generation unit) that sets a batch transmission final flag indicating that it is the final transmission frame of batch transmission data in the transmission frame of And a transmission unit (transmission circuit, transmission means) for transmitting a transmission frame.

The communication method according to the present invention is a communication method for collectively transmitting data without delegating the transmission right according to a communication method in which the number of frames that can be transmitted at one time is not limited. Batch transmission data is divided to generate a transmission frame, and a serial number is assigned to the transmission frame, and the final transmission frame of the batch transmission data is a batch to indicate that it is the final transmission frame of the batch transmission data. It is characterized in that the transmission final flag is set and the transmission frame is transmitted! /.

[0038] A communication device according to the present invention is a communication device that collectively receives data without transfer of transmission right according to a communication method in which the number of frames that can be transmitted at one time is not limited. The serial number analysis unit (serial number analysis circuit, serial number analysis means) that analyzes the serial number included in the serial number to determine whether or not there is an error in the serial number, and the batch transmission final flag included in the reception frame is the corresponding reception frame. The serial number analysis unit detects an error in the received frame received so far when it indicates that the final transmitted frame of the batch transmission data divided into a plurality of transmission frames by the transmitter and transmitted collectively. If it is set, a transmission frame including an error-free flag set to indicate that there is an error and a serial number at the time of error occurrence is generated. A transmission frame generation unit (transmission frame generation circuit, transmission frame generation means); and a transmission unit (transmission circuit, transmission means) for transmitting the transmission frame.

Further, a communication method according to the present invention is a communication method for collectively receiving data according to a communication method in which the number of frames that can be transmitted at one time is not limited and the transmission right is not delegated, The serial number included in the frame is analyzed to determine whether there is no error in the serial number, and the batch transmission final flag included in the received frame is the received frame. If it indicates that it is the last transmission frame of the batch transmission data divided into multiple transmission frames by the transmitter and sent together, if an error is detected in the reception frame received so far, there is an error It is characterized in that a transmission frame including an error free flag set to indicate and a serial number at the time of error occurrence is generated, and the transmission frame is transmitted.

Further, a communication system according to the present invention is characterized by including the communication device as the transmitter and the communication device as the receiver. / Scold.

With the above configuration and method, according to a communication method in which there is no limit on the number of frames that can be transmitted at one time, the transmitter transmits batch transmission data in batch transmission of data without delegating transmission right. The transmission frame is divided to generate a transmission frame, and a serial number is assigned to the transmission frame, and a batch transmission final flag indicating that it is the last transmission frame of batch transmission data is set in the final transmission frame of batch transmission data. And transmit the transmission frame. On the other hand, in the receiver, the serial number included in the received frame is analyzed to determine whether there is an error in the serial number, and if an error is detected in the received frame, the no error flag set to indicate that there is an error and Generate a transmission frame including the serial number at the time of error occurrence and transmit it to the transmitter. Then, when the transmitter receives a frame including a serial number at the time of occurrence of an error from the receiver, the transmitter retransmits a transmission frame corresponding to the serial number.

[0042] Here, the receiver determines that the transmitter has received the final transmission frame of the transmission frames obtained by dividing the batch transmission data, according to the batch transmission final flag included in the reception frame. The transmission frame including the serial number when the error occurs is not transmitted. That is, error notification is performed in batch transmission data units.

Therefore, there is no limitation on the number of frames (window size) that can be transmitted or received at one time! ヽ Even if a communication method is used, it is possible to detect missing frames and retransmit, so reliability can be achieved. There is an effect that high communication can be performed. In addition, since the error notification is performed in units of batch transmission data, the efficiency of data transfer has a positive effect.

In this case, the communication device may be realized by a computer. In this case, the communication device may be combined by operating a computer as each part of the communication device. The communication program of the communication device realized by the computer and the computer readable recording medium recording the same also fall within the scope of the present invention.

Further, the communication device may be realized by a communication circuit that functions as the above-described units.

Further, the communication device is suitable for a mobile phone that communicates by the communication device. According to the above mobile phone, it is possible to communicate with quality and Z with high transfer efficiency.

Furthermore, the communication device is suitable for a display device that displays based on data received by the communication device. According to such a display device, communication can be performed with high quality and high Z or transfer efficiency.

In addition, the communication device is suitable for a printing apparatus that prints based on data received by the communication device. According to such a printing apparatus, communication can be performed with high quality and high Z or transfer efficiency.

In addition, the communication device is suitable for a recording device that records data received by the communication device. According to such a recording apparatus, communication with high quality and Z or transfer efficiency can be performed.

[0050] Other objects, features and advantages of the present invention will be fully addressed by the description given below. Also, the advantages of the present invention will be apparent from the following description with reference to the accompanying drawings.

Brief description of the drawings

FIG. 1 is a block diagram showing a configuration of a primary station according to a first embodiment of a communication system of the present invention.

FIG. 2 is a block diagram showing the configuration of a secondary station according to the first embodiment.

FIG. 3 is a block diagram showing a frame configuration in the first embodiment of the above embodiment.

FIG. 4 is a signal sequence diagram showing a procedure of data transfer processing in the first embodiment.

FIG. 5 is a signal sequence diagram showing a procedure of data transfer processing when an error occurs in the first embodiment. [6] It is a block diagram showing a configuration of a primary station and a secondary station according to a second embodiment of the communication system of the present invention.

FIG. 7 is a block diagram showing a frame configuration in the second embodiment described above.

圆 8] is a signal sequence diagram showing a procedure of data transfer processing in the second embodiment.

FIG. 9 is a block diagram for explaining the application of the conventional HDLC communication system and IrDA communication system.

FIG. 10 is a signal sequence diagram for illustrating a general procedure of data transfer using an I frame in the IrDA communication standard.

FIG. 11 is a signal sequence diagram for describing a general procedure of data transfer using a UI frame in the IrDA communication standard.

[12] FIG. 12 is a block diagram showing a configuration of a primary station and a secondary station according to a third embodiment of the communication system of the present invention.

FIG. 13 is a diagram showing a protocol stack of the data transfer system in the third embodiment.

FIG. 14 is a block diagram showing a frame configuration in the third embodiment.

[15] FIG. 15 is a signal sequence diagram showing a procedure of data transfer processing in the third embodiment.

圆 16] FIG. 16 is a signal sequence diagram showing a data transfer procedure when an authentication request is issued from an upper layer at the time of authentication or the like in the third embodiment.

圆 17] FIG. 17 is a signal sequence diagram showing another procedure of data transfer when an authentication request is issued from an upper layer at the time of authentication in the third embodiment.

FIG. 18 is a diagram showing a conventional IrDA protocol stack.

FIG. 19 is a sequence diagram at the time of connection in the conventional IrDA.

[Fig. 20] This is a sequence diagram of OBEX connection, data transfer, and disconnection.

FIG. 21 is a sequence diagram showing the flow of data transfer in IrDA.

[Fig. 22] (a) shows the frame format of I frame in IrLAP, (b) shows the frame format in IrLAP

It is explanatory drawing which shows the frame format of UI frame. FIG. 23 is an explanatory view showing a frame format of IrLMP.

FIG. 24 is an explanatory drawing showing the frame format of the TinyTP layer.

[FIG. 25] (a) shows the frame format of OBEX Put command, (b) shows the frame format of CONTINUE response, and (c) shows the frame format of SUCCESS response.

FIG. 26 is a sequence diagram showing the flow of data transfer in IrSimple's two-way communication.

[FIG. 27] (a) is an explanatory view showing a frame format of an SMP frame in the case of two-way communication of IrSimple, and (b) is a frame format of an SMP frame in the case of one-way communication of IrSimple.

FIG. 28 is a sequence diagram showing the flow of data transfer in IrSimple one-way communication.

[Fig. 29] This is a sequence diagram showing data transfer by OBEX's Put command, with OBEX as the upper layer.

FIG. 30 is a sequence diagram showing an example of communication in which a receiver collectively transmits a frame including an error-free flag and a frame including SUCCESS into one.

FIG. 31 is a block diagram showing a configuration of a transmitter according to a fourth embodiment of the present invention used in the communication system of the present invention.

[32] FIG. 32 is a block diagram showing a configuration of a receiver according to the fourth and fifth embodiments used for the communication system of the present invention.

FIG. 33 is a sequence diagram according to a fourth embodiment of the present invention used in the communication system. [34] FIG. 33 is a block diagram showing a configuration of a transmitter according to the fifth embodiment used in the communication system of the present invention.

[Fig. 35] A first sequence diagram according to the fifth embodiment of the present invention used in the communication system of the present invention.

[FIG. 36] A second sequence diagram according to the fifth embodiment of the present invention used in the communication system of the present invention.

[FIG. 37] A block diagram showing a configuration of a transmitter according to a sixth embodiment of the present invention used in the communication system of the present invention. [FIG. 38] A block diagram showing the configuration of a receiver according to a sixth embodiment of the present invention used in the communication system of the present invention.

FIG. 39 is a sequence diagram according to the sixth embodiment of the present invention used in the communication system.

FIG. 40 is a block diagram showing a configuration of a transmitter according to a seventh embodiment of the present invention used in the communication system of the present invention.

[FIG. 41] A block diagram showing a configuration of a receiver according to a seventh embodiment of the present invention used in the communication system of the present invention.

FIG. 42 is a sequence diagram according to a seventh embodiment of the present invention used in the communication system.

FIG. 43 is a sequence diagram according to an eighth embodiment used for the communication system of the present invention. [44] FIG. 43 is a block diagram showing a configuration of a transmitter according to the ninth embodiment used for the communication system of the present invention.

[FIG. 45] A block diagram showing a configuration of a receiver according to a ninth embodiment used for the communication system of the present invention.

FIG. 46 is a sequence diagram according to a ninth embodiment of the present invention used in the communication system.

[FIG. 47 is a block diagram showing configurations of a PEG encoder and a JPEG decoder.

[FIG. 48 is an explanatory view of a block of PEG (mcu), wherein (a) is 8 × 8, (b) 8 × 16, (c) 16

X 8 (d) shows a block of 16 X 16

FIG. 49 is an explanatory diagram of division and retransmission processing in units of mcu in the communication system of the present invention.

FIG. 50 is an explanatory diagram of line-by-line division and retransmission processing in the communication system of the present invention.

FIG. 51 is an explanatory diagram of the file division and retransmission processing in the communication system of the present invention.

FIG. 52 is a block diagram showing the configuration of a client device in a conventional communication system. FIG. 53 is a flowchart showing the operation of the OBEX client in the conventional communication system.

圆 54] FIG. 54 is a block diagram showing a configuration of a client device in the communication system of the eleventh embodiment and the twelfth embodiment of the present invention.

FIG. 55 is a flowchart showing an operation of the OB EX layer in the client device in the communication system of the eleventh embodiment.

圆 56] A flowchart showing another operation of the OBEX layer in the client device in the communication system of the eleventh embodiment according to the present invention.

圆 57] a flowchart showing an operation of the OBEX layer in the client device in the communication system of the twelfth form of implementation according to the present invention;

FIG. 58 is a block diagram showing the configuration of server equipment in a conventional communication system.

FIG. 59 is a flowchart showing the operation of the OBEX server in the conventional communication system.

[60] This is a block diagram showing another configuration of the server device in the communication system of the thirteenth and fourteenth modes of the present invention.

[FIG. 61] A flowchart showing an operation of the OBEX layer in the server device in the communication system of the thirteenth embodiment described above.

[FIG. 62] A flowchart showing another operation of the OBEX layer in the server machine in the communication system of the thirteenth embodiment described above.

圆 63] It is a flow chart showing the operation of the OBEX layer in the Sano apparatus in the communication system of the fourteenth embodiment according to the present invention.

[64] It is explanatory drawing of the communication system which concerns on the 15th form of implementation using the communication system of this invention.

[FIG. 65] An explanatory diagram of a communication system according to a sixteenth embodiment of the present invention using the communication system.

圆 66] It is an explanatory view of a communication system according to a seventeenth embodiment of the embodiment using the communication system of the present invention.

[67] Description of the communication system according to the eighteenth mode of implementation using the communication system of the present invention FIG.

[Figure 68] A schematic diagram showing the correspondence relationship between the [OSI 7 hierarchical model], the IrDA hierarchy, and the hierarchy of the present invention.

FIG. 69 (a) is a sequence diagram of connection establishment according to an embodiment of the present invention. (b) is a sequence diagram of connection establishment according to the embodiment of the present invention. (C) is a packet format for connection establishment according to the embodiment of the present invention.

FIG. 70 (a) is a diagram showing a data exchange sequence according to an embodiment of the present invention. (b

) Is a diagram showing a data exchange sequence according to an embodiment of the present invention.

[FIG. 71] (a) is a diagram showing a packet format used in data exchange of IrDA.

(b) is a figure which shows the packet format used by the data exchange of this invention.

FIG. 72 (a) is a diagram showing a data exchange sequence according to an embodiment of the present invention. (b

FIG. 73 (a) is a view showing a cutting sequence according to the embodiment of the present invention. (b) is a figure which shows the cutting | disconnection sequence which concerns on embodiment of this invention. (C) is a packet format of a disconnection sequence according to the embodiment of the present invention.

FIG. 74 is a sequence diagram showing the flow of functions (instructions, messages) between each layer and packets during a connection sequence according to an embodiment of the present invention.

FIG. 75 (a) is an explanatory view showing a change of data in a function among layers of the arrow pointing to the right in FIGS. 74 and 76 in the connection sequence according to the embodiment of the present invention. (b) is a figure which shows the change of the data in the function between each layer based on Embodiment of this invention.

FIG. 76 is a sequence diagram showing the flow of functions (instructions, messages) between each layer and packets at the time of a connection sequence according to an embodiment of the present invention.

FIG. 77 is a sequence diagram showing the flow of functions (instructions, messages) between each layer and packets at the time of data exchange according to the embodiment of the present invention.

FIG. 78 is a diagram showing changes in data in functions among the layers in FIG. 77 and FIG. 79 at the time of data exchange according to an embodiment of the present invention.

[FIG. 79] Function between each layer at the time of data exchange according to the embodiment of the present invention (instruction, message) And the flow of packets.

FIG. 80 is a sequence diagram showing the flow of functions (instructions, messages) between each layer and packets at the time of a disconnection sequence according to the embodiment of the present invention.

FIG. 81 (a) is an explanatory view showing a change of data in a function among layers of the arrow pointing to the right in FIG. 80 and FIG. 82 at the time of cutting sequence according to the embodiment of the present invention. (b) is explanatory drawing which shows the change of the data in the function between each layer based on Embodiment of this invention.

FIG. 82 is a sequence diagram showing the flow of functions (instructions, messages) between each layer and packets during the disconnection sequence according to the embodiment of the present invention.

FIG. 83 is a schematic diagram showing passing of connection request function data and connection parameters in the primary station according to an embodiment of the present invention.

FIG. 84 is a schematic view showing delivery of connection parameters of a connection request function in a secondary station according to an embodiment of the present invention.

FIG. 85 is a schematic diagram showing passing of a connection confirmation function at a primary station, data of a connection notification function at a secondary station, and a connection parameter according to an embodiment of the present invention.

FIG. 86 is a schematic view showing passing of data of a connection response function in the secondary station according to an embodiment of the present invention.

FIG. 87 is a schematic view showing delivery of connection parameters of a connection check function in the primary station according to an embodiment of the present invention.

FIG. 88 is a schematic diagram showing transfer of connection request function data and connection parameters at the primary station in the case of sharing connection parameters between layers, which is a modification of the embodiment.

FIG. 89 is a schematic diagram showing transfer of connection notification function data and connection parameters in the secondary station in the case of sharing connection parameters between layers, which is a modification of the embodiment.

FIG. 90 is a schematic diagram showing delivery of connection request function data and connection parameters in the primary station when each layer separately passes the connection parameters to the lower layer, which is a modification of the embodiment.

[Explanation of the code] 1 Primary station

11 CPU

12 memory

13 controller

14 达 1

15 Receiver

131 control unit

132 Transmission Frame Generator

133 Received frame analysis unit

1321 Data reader

1322 Frame serial number adding unit

1323 Transmission right transfer flag addition part

1324 Frame construction unit

1325 Error detection or correction code addition unit

1331 Retransmission request determination unit

1332 Frame serial number extraction unit

2 secondary station

21 CPU

22 Memory

23 controller

twenty four

25 shipment 1 3⁄4§

231 control unit

232 frame processing unit

233 Error detection or correction circuit

234 Error frame number holding unit

235 Response frame generator

236 Error Detection or Correction Code Adder 6 Primary station or secondary station

61 CPU

62 controller

63 transmitter

64 receiving

621 Control unit

622 Transmission frame generator

623 Received frame analysis unit

6221 Connection establishment frame generation unit

6222 Retransmission possible frame number addition part

6231 Frame analysis unit

6232 Retransmittable frame number detection unit

12 stations (primary station or secondary station)

121 Applocation layer processing unit

122 OBEX Layer Processing Unit

123 SMP Layer Processor

124 IrLMP layer processing unit

125 IrLAP layer processing unit

126 shipments 1st

127

1231 Control unit

1232 Transmission frame generator

1233 Received frame generator

12321 Response frame request flag addition unit

12322 Frame serial number adding unit

12323 Transmission right transfer flag addition part

12324 Retransmission request flag addition unit

12325 Frame construction unit 12331 Response frame request flag determination unit

12332 Frame serial number analysis unit

12333 Transmission right transfer flag judgment unit

12334 Retransmission request determination unit

12335 Upper layer data extraction unit

2001 transmitter (primary station, client device)

2002 control unit (control means)

2003 Memory (storage means)

2004 Batch transmission final flag generation circuit (batch transmission final flag generation means)

2005 Serial number generation circuit (serial number generation means)

2006 Transmission frame generation circuit (transmission frame generation means)

2007 Transmission unit (transmission means)

2008 Receiver (Receiver)

2009 Received frame analysis circuit (received frame analysis means)

2010 No Error Flag Analysis Circuit (No Error Flag Analysis Means)

2011 error detection circuit (error detection means)

2012 serial number analysis circuit (serial number analysis means)

2101 Receiver next station, server device)

2102 Control unit (means)

2103 Memory (means)

2104 No error flag generation circuit (No error flag generation means)

2105 Serial number generation circuit (serial number generation means)

2106 Transmission frame generation circuit (transmission frame generation means)

2107 Transmission unit (transmission means)

2108 Receiver (Receiver)

2109 Reception frame analysis circuit (reception frame analysis means)

2110 Batch transmission final flag analysis circuit (batch transmission final flag analysis means)

2111 Error detection circuit (error detection means) 2112 Serial number analysis circuit (serial number analysis means)

2201 Transmitter (Primary station, client device)

2213 Timer (Timekeeping means)

2301 Transmitter (Primary station, client device)

2313 Opposite-station buffer size analysis circuit (opposite-station buffer size analysis means)

2401 Next to receiver, server equipment)

2413 Buffer Size Generator (Buffer Size Generator)

2501 Transmitter (Primary station, client device)

2513 Data final flag generator (data final flag generator)

2601 Receiver next station, server device)

2613 Data final flag analysis circuit (data final flag analysis means)

2701 Transmitter (Primary station, client device)

2702 Control unit (control means)

2703 Memory (storage means)

2705 Serial number generation circuit (serial number generation means)

2706 Transmission frame generation circuit (transmission frame generation means)

2707 Transmission unit (transmission means)

2713 Data final flag generation circuit (data final flag generation means) 2801 Next to receiver, server equipment

2802 Control unit (means)

2803 Memory (means)

2808 Receiver (Receiver)

2809 Reception frame analysis circuit (reception frame analysis means)

2811 Error detection circuit (error detection means)

2812 Serial number analysis circuit (serial number analysis means)

2813 Data final flag analysis circuit (data final flag analysis means)

3300 client device (communication device, primary station)

3310 Application layer processing unit 3320 OBEX layer processing unit (object exchange layer processing unit)

3321 Control unit

3322 Request notification part

3323 Response receiver

3324 Communication direction selector

3330 Lower Layer Processor

3340 transmitter

3350 Receiver

3500 server device (communication device, secondary station)

3510 Application Layer Processor

3520 OBEX layer processing unit (object exchange layer processing unit)

3521 Controller

3522 Response notification unit

3523 Request Analysis Unit

3530 Lower Layer Processor

3540 transmitter

3550 Receiver

BEST MODE FOR CARRYING OUT THE INVENTION

First, the outline of the communication system of the present invention will be described with reference to FIGS. 21 to 30 as follows.

[Overview]

(Communication layer)

In each embodiment described later, the configuration and operation of the transmitter and receiver of the communication system according to the present invention will be described in detail based on the OSI 7 layer model. Here, the OSI 7 layer model is also called the "OSI basic reference model" or "OSI hierarchical model".

In the OSI seven-layer model, the communication functions that a computer should have are divided into seven layers in order to realize heterogeneous data communication, and standard functional modules are defined in each layer. It is done.

Specifically, the first layer (physical layer) is responsible for electrical conversion and mechanical work for transmitting data to the communication line. The second layer (data link layer) secures a physical communication channel and performs error detection of data flowing through the communication channel. The third layer (network layer) performs communication path selection and management of addresses in the communication path. The fourth layer (transport layer) performs data compression, error correction, and retransmission control. The fifth layer (session layer) establishes and releases virtual routes (connections) for communication programs to send and receive data. The sixth layer (presentation layer) converts data received from the fifth layer into a format that can be easily understood by the user! /, And converts data sent from the seventh layer into a format suitable for communication. . The seventh layer (application layer) provides various services using data communication to humans and other programs.

Each communication layer of the communication system according to each embodiment also has the same function as the corresponding layer of the OSI 7 layer model. However, in each embodiment, the communication system has a six-layer structure in which the session layer and the presentation layer are one. Also, the description of the application layer is omitted.

The present invention is widely applicable to communication systems in which a transmitter and a receiver establish a connection of a plurality of communication layers to perform communication. That is, the division of communication functions does not have to conform to the OSI 7 layer model. Also, the number of communication layers can be arbitrarily selected as long as there are a plurality of communication layers to be connected.

Furthermore, since the present invention makes it possible to assign a serial number to a frame and perform frame-based retransmission for each batch transmission data, communication efficiency is high in communications with few errors. Also, even if an error occurs, retransmission can ensure the reliability of communication. Thus, the present invention is particularly suitable for communications that want to transmit a large amount of data in a short time, for example, wireless communications by infrared. However, the present invention is also effective in other wireless communication and wired communication.

Each embodiment will be described based on IrSimple, which is an application example of the present invention, for convenience of explanation. However, the present invention is not limited to IrSimple. Note that IrSimple is an improvement on some of the functions of the conventional IrDA. In each embodiment, the data link layer, the network layer, the transport layer, and the session layer + the presentation layer may be described as LAP, LMP, SMP, and OB EX, respectively, according to IrSimple. When the communication layer is distinguished by transmitter and receiver, add "P" to the transmitter and "S" to the receiver. For example, "LAP (P)" means the data link layer of the transmitter.

(Comparison of IrDA and IrSimple)

Hereinafter, IrDA, which is a prior art of the present invention, and IrSimple, which is an application example of the present invention, will be compared.

1. Flow of data transfer in IrDA

FIG. 21 shows the flow of data transfer in the conventional IrDA. In the following description, IrLAP, IrLMP, TinyTP (TTP in the figure), and OBEX are assumed to be present as the IrDA protocol stack.

(L) In the data transfer, the IrLAP layer retransmits when an error occurs, thereby providing a mode in which the reliability of the data is guaranteed to the upper layer, and without performing an error retransmission when an error occurs, to the upper layer. There are modes that do not guarantee the reliability of the data. In this description, data transfer is performed in the mode that guarantees the aforementioned reliability. Also, in order to guarantee the reliability, IrLAP performs data transfer using an I (Information) frame.

FIG. 22 (a) shows the frame format of I frame in IrLAP.

[0066] The I frame is assigned a serial number so that the device receiving the frame can detect a frame dropout. This serial number is assigned to the Ns field area in Fig. 22 (a).

In IrLAP, when performing data transfer using I frames, a limit is placed on the number of frames that can be transmitted at one time (window size), and the window size is 7 at maximum. In this window size, when connected, the primary station and secondary station notify the opposite station of the number of frames (window size) that the own device can receive at one time. Then, continuously transmit frames that exceed the window size of the opposite station. In this explanation! The window size of the primary station is 1, and the window size of the secondary station is 2.

Also, in order to notify whether the device that received the frame received successfully, the Nr field Exists. If all the frames received in succession are normal, send the desired serial number by setting it in the Nr field. For example, if Ns receives frames 1 and 2 continuously, and all of them are received normally, set 3 in the Nr field and transmit.

On the other hand, if there is an error in the received frame, the serial number of the frame desired to be retransmitted is set in the Nr field and transmitted. For example, when it is determined that Ns = 1 and 2 frames are continuously received and it is determined that 2 frames have an error, Nr field is set to 2 and transmitted.

After continuously transmitting frames, the device transmitting the frame monitors the Nr field of the received frame, and the Nr field is one more than the Ns value of the last transmitted frame of the frames transmitted by the own device. If it is a value, it recognizes that all previous consecutive frame transmissions have been completed successfully, and starts transmitting the next frame. Also, if the Nr field of the received frame is the value of some serial numbers in the frame transmitted by the own device, retransmission will be performed from that serial number. At this time, the Ns field is also rearranged from the value of the Nr field.

The above-described procedure enables retransmission using I-frames in the IrLAP layer. When IrLAP retransmission is used, the window size is a maximum of 7 according to the IrLAP standard, so continuous transmission of eight or more frames is impossible.

(2) The IrLMP layer is a layer that provides a logical channel for each application (LSAP: Link Service Acces- sion Point) to the upper layer.

[0073] FIG. 23 shows the IrLMP frame format.

[0074] The IrLMP layer on the transmitting side of the frame arranges data of upper layer (TinyTP layer) power and IrLM P frame, and also transmits a logical channel (DLSAP: Destination Link Service Access Point) of transmission destination and transmission. Place the original rational channel (SLSAP: Source Link Service Access Point) as the IrLMP header.

On the other hand, in the IrLMP layer on the side of receiving the frame, by monitoring the DLS AP field of the received frame from the lower layer, it is determined which upper layer application data it is, and to the corresponding upper layer application. On the other hand, pass the data in the received frame. (3) The TinyTP layer is a layer that performs division / combination and flow control of upper layer (OBEX layer) data.

[0077] FIG. 24 shows the frame format of the TinyTP layer.

When the transmission data is passed from the upper layer, the TinyTP layer divides the transmission data within the range not exceeding the maximum frame length of the lower layer (LAP layer), and transmits the data to the lower layer (LMP layer). give. Also, on the receiving side, the data in the received frame from the lower layer (IrLMP layer) is combined and passed to the upper layer (OBEX layer). Also, in order to prevent the reception buffer from overflowing, the number of frames that it can receive is notified to the opposite station in the form of credits. And it is not possible to continuously transmit frames that exceed the credits of the opposite station.

(4) The OBEX layer is a protocol for object exchange.

[0080] FIG. 25 shows the frame format of the OBEX layer.

Figure 25 (a) shows the format of the Put command in the OBEX layer. When transmitting files, the OBEX layer uses the Put command to transmit. In addition, information such as the file name of the file to be sent and the file size are also added.

Also, FIGS. 25 (b) and (c) are frame formats of the power CONTINUE response and the SUCCESS response. The receiving side of the file needs to return a response each time the Put command is received. When a non-final Put command is received, a CONTI NUE response is returned, and when a final Put command is received, a SUCCESS response is returned.

Next, the procedure of data transfer using the OBEX Put command in the conventional IrDA will be described.

When a file transmission request is generated at the OBEX of the primary station, the OBEX layer (hereinafter referred to as OBEX (P)) of the primary station is referred to as the TinyTP layer (hereinafter referred to as TTP (hereinafter referred to as the TTP). P) Pass Put command as send data. In the present description, it is assumed that Put command force data P 0, data P 1, data P 2 and data P 3 are configured.

[0085] Upon receiving this, TTP (P) divides the transmission data into the maximum data length of the lower LAP layer. In this description, in TTP (P), dataP0, dataPl, dataP2, dataP It shall be divided into three. Also, since TTP (P) has a receivable credit of 1, the credit is 1. The credit and divided data are used to generate an overhead frame, which is passed to the lower layer, the IrLMP layer (hereinafter referred to as LMP (P)) of the primary station.

The LMP (P) that has received this adds logical channel information (LSAP header) to generate an LMP frame, and the IrLAP layer of the primary station that is the lower layer (hereinafter referred to as LAP (P) Pass to).

The LAP (P) that has received this performs data transfer using an I frame. In this explanation! Since the window size of the secondary station is 2, the I frame with Ns 0 and 1 is continuously transmitted.

On the other hand, in the IrLAP layer (hereinafter, LAP (S)) of the secondary station, when the above-mentioned I frame is continuously received, while detecting the omission of a frame while monitoring the Ns field, Pass the upper layer data to the IrLMP layer (hereinafter referred to as LMP (S)) of the secondary station that is the upper layer. Also, although it is necessary to perform continuous reception success notification of I frame, in this description, the continuous reception success notification frame in which the Nr field is 2 is not transmitted at this stage.

[0089] The LMP (S) that has received the above frame reception notification passes the upper layer data to the upper layer TinyTP layer (hereinafter, TTP (S)) of the secondary station after removing the LSAP header.

The received TTP (S) combines upper layer data in the received frame. In this description, the unit of data passed to the OBEX layer corresponds to the data size combining dataPO, dataPl, dataP2, and dataP3. Therefore, when dataP0 and dataPl are combined, data is received from the OBEX layer We did not give notice. Also, since data processing for TTP (S) receivable credits of 2 minutes (combination processing of dataP0 and dataPl) is completed, the own device can receive 2 frames with 2 credits for the opposite station. Pass TinyTP frame to lower layer to notify that there is.

[0091] Upon receiving this, LMP (S) adds LSAP information as an LMP header and passes it to LAP (S).

[0092] The LAP (S) that has received this performs data transfer using the I frame. At this time, it transmits by setting the value 2 of the Ns field which it wants to transmit next to the Nr field for the IAP frame continuous reception success notification of LAP which was holding transmission above. Also, in the Ns field, set the serial number of the secondary station's transmission frame together. [0093] Having received this, the LAP (P) checks whether the previous continuous transmission of I frame has ended normally by monitoring the Nr field. In the case of this explanation, since the Nr field is 2, it is recognized that the secondary station has successfully received an I frame of 0 and 1 from the previously transmitted Ns field. Also, since the upper layer data is included in the received I frame, the upper layer data is passed to LMP (P).

[0094] After receiving this, LMP (P) passes upper layer data to TTP (P) after removing the LSAP header.

The TTP (P) that has received this recognizes that the TTP (S) of the opposite station can receive two frames since the opposite station's credit in the received frame is 2. Among the transmission data, add the credit information of the primary station to the remaining divided data dataP2 and dataP3 respectively, and pass them to LMP (P).

[0096] Upon receiving this, LMP (P) adds an LSAP header and passes it to LAP (P).

[0097] The LAP (P) that has received this transmits two pieces of transmission data from the upper layer using two I frames. At this time, the value of the Ns field of the next secondary station is set in the Nr field in order to notify that the reception of the I-frame by the above-mentioned secondary station was successful, and the Ns field Set the value obtained by adding 1 to the value of the Ns field of the I frame last transmitted by the primary station.

Having received this, the LAP (S) recognizes that the primary station has successfully received the I frame transmitted by the secondary station last time by monitoring the Nr field, and the LAP (S) in the received I frame Pass upper layer data to LMP (S).

[0099] The LMP (S) that has received this removes the LSAP header and passes it to the TTP (S).

The received TTP (S) combines upper layer data in the received frame. DataP2 and dataP3 received this time are combined with the above combined upper layer data (dataPO and dataPl). At this point, since the data size passed to the upper layer OBEX layer has been reached, the upper layer data is passed to the OBEX layer (hereinafter referred to as OBEX (S)) of the secondary station that is the upper layer. At this point, since processing of the received data is completed, the credit may be passed to the lower layer as 2, but in the present invention, this transmission processing is suspended.

[0101] Upon receiving this, OBEX (S) analyzes lower level data and is a Put command. To generate a response frame to return a response to the primary station's OBEX.

Pass to TTP (S). In the case of this explanation, since the received command is a Put command that is not final, a CONTINUE command will be generated.

[0102] Upon receipt of this, TTP (S) combines the above-mentioned credit and upper layer strength data to create Tiny.

Generate a TP frame and pass it to LMP (S).

[0103] The LMP (S) that has received this adds the LSAP header and passes it to the LAP (S).

Receiving this, the LAP (S) performs data transfer using the I frame. At this time, the Nr field is set to indicate that the previous I frame has been successfully received, and the Ns field is set to a serial number.

[0105] The LAP (P) that has received this recognizes that the secondary station has successfully received the two I-frames transmitted last time by monitoring the Nr field, and the upper layer in the received I-frames. Pass data to LMP (P).

[0106] Receiving this, LMP (P) removes LSAP header and passes upper layer data to TTP (P)

[0107] Upon receiving this, TTP (P) passes the data in the received frame to ΟΒΕΧ (Ρ).

[0108] Receiving this, ΟΒΕΧ analyzes the received frame. In this description, CONT

Since the INUE response has been received, it recognizes that the data transfer with the previous Put command (dataPO and dataP3) was successfully transferred to the secondary station.

Thus, the communication in the case of a non-final Put command is completed.

[0110] In the case of final Put command communication, the flow of other communication is basically the same except that the response strength returned from OBEX (S) is changed to the SSUCCESS response.

As described above, under the conditions of the present description, the number of frames flowing through the communication path is twelve.

2. Flow of data transfer in two-way communication of IrSimple

FIG. 26 shows the flow of data transfer in two-way communication of IrSimple, which is an application example of the present invention. In the following description, the primary station and the secondary station respectively support the IrLAP layer, the IrLMP layer, the IrSMP layer (Infrared Sequence Management Protocol), and the OBEX layer. It is assumed that

(L) In the IrLAP layer, data transfer is performed using a UI frame. As described above, when using UI frames, there is no limitation on the window size, and it is possible to continuously transmit more frames than the number of frames that can be continuously transmitted at one time using I frames. As a result, it is expected that the data transfer efficiency can be reduced by accumulating the time (Min Turn Around Time) which has to wait before starting transmission after frame reception.

FIG. 22 (b) shows the frame format of the LAP layer UI frame.

As shown in FIG. 22 (b), the N r and Ns fields present in the I frame (in FIG. 22 (a)) are not present in the UI frame. This indicates that the frame is not assigned a serial number, indicating that frame loss detection can not be performed at the LAP layer level, and that it is not possible to set the frame serial number to be requested for retransmission. ing. That is, in the case of transfer using UI frames, the reliability of upper layer data at the LAP layer level is not guaranteed.

[0117] As shown in FIG. 23, in the IrLMP layer on the side of transmitting the frame, the higher layer (TinyTP layer) is placed in the powerful data and IrLMP frame, and the logical channel of the transmission destination (D LSAP: Destination Link Service Access Point) and the sender's rational channel (SLS AP: Source Link Service Access Point) are placed as an IrLMP header.

On the other hand, in the IrLMP layer on the side of receiving the frame, by monitoring the DLS AP field of the received frame from the lower layer, it is determined which upper layer application data it is, and to the corresponding upper layer application. On the other hand, pass the data in the received frame.

(3) The IrSMP layer divides and combines data of upper layers. Also, as described above, since data transfer is performed using the UI frame in the IrLAP layer, and retransmission control in the IrLAP layer is not performed, retransmission control is performed in this IrSMP layer.

Specifically, in the IrSMP layer (hereinafter, SMP (P)) of the primary station, the upper layer data is divided into the maximum data length of the UI frame of the lower layer or less, and then the divided data is divided into a plurality of frames. Deploy and pass to LMP (P). At that time, add serial number, batch transmission end flag, and data end flag as SMP header.

FIG. 27 (a) shows a frame format of an SMP frame in the case of two-way communication with IrSimple.

The sequence number increases by one for each frame. If an error occurs during communication, renumber the re-transmission request serial number sent by the secondary station, and transmit the SMP frame again.

The batch transmission end flag (BL in the figure: Block Last) is an SMP frame within a range not exceeding the size of the reception buffer of the secondary station based on the reception buffer size notified from the secondary station at the time of connection. When continuously transmitting, when transmitting the final frame, set it to a value (BL = 1 in the figure) indicating the end of batch transmission. The secondary station monitors the serial number of the received frame and detects missing frames. When a secondary station receives a frame with BL = 1, if no frame loss or error is detected in the frames received so far, the flag indicating no error (RS: Receive Status) means no error (RS in the figure). Pass to the lower layer as = 1). Also, if an error occurs, set the serial number you want to retransmit to the serial number.

The data end flag (DL: Data Last) is a flag indicating whether or not the final data of the upper layer data is included in the frame. If it is included, set it to a value indicating that (DL = 1 in the figure). Also, the IrSMP layer (hereinafter, SMP (S)) of the secondary station combines the received upper layer data, and makes a connection with the OBEX layer (hereinafter, OBEX (S)), which is the upper layer of the secondary station. Once the received data is combined up to a defined data size, the combined data is passed to the upper layer.

(4) The OBEX layer is a protocol for object exchange. When sending a file, send using the Put command. As described above, perform file transfer with the Put command.

Also, on the file receiving side, in the method of the present invention, OBEX (S) returns a SUCCESS response only for the final Put command when receiving the Put command reception, and receives the non-final Put command. Sometimes we do not send back a CONTINUE response. Also, in the OBEX layer (hereinafter referred to as OBEX (P)) of the primary station, when sending a Put command that is not final In the second station, send the next Put command without waiting for the CONTINUE response, and wait for the SUCCESS response from the second station only when sending the last Put command, and the second station sends data using the Put command. Determine if the power was successfully received. As mentioned above, omitting the exchange of CONTINUE response can be expected to reduce the number of frames in the LAP layer.

Next, the flow of data transfer in bi-directional communication according to the scheme of the present invention will be described.

[0128] When a file transmission request is generated in the primary station OBEX, OBEX (P) passes a Put command as transmission data to TTP (P). In this description, it is assumed that a non-final Put command consists of dataP0, dataP1, dataP2 and dataP3, and a final Put command consists of dataP4, dataP5, dataP6 and dataP7. OBEX (P) is not final! /, Wait for reception of CONTINUE response to Put command! Because, if there is a space in the send buffer of SMP (P), pass Put command to SMP (P) continuously. .

The SMP (P) that has received this divides the transmission data by the maximum data length of the LAP layer that is the lower layer or less. In this description, SMP (P) is divided into dataP0, dataP1, dataP2, and dataP3. Also, in the SMP (P), Seq and BL are set to perform retransmission control. In this explanation, it is assumed that SMP (P) recognizes that the size of the receive buffer obtained from the secondary station's SMP (S) at the time of connection is the sum from dataPO to dataP5. Frames are transmitted continuously, and BL is set to 1 when transmitting dataP5 frames. In this description, the size of the reception buffer is 6 frames, but it may be a value larger than this, for example, 128 frames (256 KB assuming that the maximum data length of the LAP layer is 2 KB). In this case, BL = 1 (DL = 1) is set only at the frame transmission of dataP7. The SMP frame to which the SMP header (DL, BL, SEQ) is added by SMP (P) is passed to LMP (P).

[0130] In the LMP (P) that receives this, the LSAP header is added and passed to the LAP (P).

In the LAP (P) that has received this, data transfer in the UI frame is performed.

The LAP (S) that receives this passes the upper layer data in the UI frame to the LMP (S).

[0133] The LMP (S) that receives this removes the LSAP header and passes upper layer data to the SMP (S). The SMP (S) that has received this detects a drop in the SMP frame by monitoring the serial number, and performs combining for the upper layer data without a frame drop. In this description, since the unit of the data size of the upper layer predetermined with OBEX (S) is the size of the data obtained by combining dataPO and dataP3, when dataP3 is completely connected, the upper layer is determined. Pass combined data to When a frame with DL = 0 and BL = 1 is received, no frame skipping or error is detected in the received frame so far, so the error-free flag RS is set to 1 and passed to the lower layer.

[0135] In OBEX (S) that has received the aforementioned received data of SMP (S) power, the received data is analyzed. In this explanation, do not send a CONTINUE response back to the primary station, because it is a Put command that is not final.

Also, the LMP (S) that received the above RS = 1 SMP frame adds a LSAP header and passes it to the LAP (S).

Having received this, the LAP (S) performs data transfer in the UI frame.

Having received this, LAP (P) passes upper layer data in the UI frame to LMP (P).

[0139] Upon receiving this, LMP (P) removes the LSAP header and passes upper layer data to SMP (P).

Receiving this, the SMP (P) recognizes that the previous batch transmission was successfully performed because the RS field in the received frame is 1, and the remaining upper layer divided data is Transmits divided data dataP6 and dataP7. Also, when transmitting dataP7, BL = 1 and DL = 1 to notify that this frame is the last frame of upper layer data.

[0141] The LMP (P) that has received this passes the LSAP header to the LAP (P).

The LAP (P) that has received this performs data transfer in a UI frame.

Having received this, the LAP (S) passes upper layer data in the UI frame to the LMP (S).

[0144] Upon receiving this, LMP (S) removes the LSAP header and passes upper layer data to SMP (S).

The SMP (S) that has received this detects a missing frame by monitoring the serial number in the received frame, and for the frame without an error, Combine layer data and pass combined data to upper layers. Also, in this description, since BL of the frame including dataP7 is 1 and DL is 1 at the same time, a frame (frame including RS) for notifying the reception result in the SMP layer is transmitted at this time. do not do.

[0146] The received OBEX (S) analyzes the inside of the received data and recognizes that the received data is the final Put command. If the previous received command is normal, Generate a SUCCESS response and pass it to SMP (S).

The SMP (S) having received this sets the above reception result (RS) in the SMP layer to 1, passes it to the LMP (S) together with higher layer data.

[0148] The LMP (S) that has received this adds the LSAP header and passes it to the LAP (S).

Having received this, the LAP (S) performs data transfer in the UI frame.

[0150] The LAP (P) that has received this passes upper layer data in the UI frame to the LMP (P).

[0151] Upon receiving this, LMP (P) removes the LSAP header and passes upper layer data to SMP (P).

The SMP (P) that has received this recognizes that the previous batch transmission was successfully performed because the RS field in the received frame is 1, and the upper layer data becomes OBEX (P). hand over.

[0153] Upon receiving this, OBEX (P) analyzes the received data, and recognizes that the received data is a SUCCESS response, and the data in the Put command and the final Put command are the final ones until then. It will be recognized that all transfers have ended normally.

As described above, even in the case where a UI frame is used in the IrLAP layer, it is possible to perform reliable communication by performing retransmission control in the SMP layer. Also, by using the UI frame, there is no limitation on the window size in the case of using the I frame, and it becomes possible to perform communication optimized for the reception buffer size of the secondary station.

As described above, under the conditions of the present description, the number of frames flowing through the communication path is 10, and communication with a smaller number of frames as compared to the communication using the I frame described above for the conventional IrDA. Is possible.

Further, in the present description, the number of frames that can be collectively transmitted in the SMP layer is set to six. This value is the transmission buffer of the primary station for retransmission and the reception of the secondary station. As long as the size of the transmission buffer allows, it can be set as many as possible, and it is possible to realize communication with the maximum capacity of the communication system. On the other hand, in communication using I frame, even if the primary station and secondary station each have a large amount of buffers, the communication efficiency is improved by the window size restriction (7 in LAP). It is difficult to achieve.

[0157] 3. Flow of data transfer in one-way communication of IrSimple

FIG. 28 shows the flow of data transfer in IrSimple one-way communication, which is an application example of the present invention. In the following description, it is assumed that the primary station and secondary station respectively support the IrLAP layer, the IrLM P layer, the IrSMP layer (Infrared Sequence Management Protocol), and the OBEX layer.

(1) In the IrLAP layer, data transfer is performed using a UI frame (FIG. 22 (b)). As described above, when using UI frames, there is no limitation on the window size, and it is possible to continuously transmit more than seven frames that can be continuously transmitted at one time using I-frames. This can be expected to reduce the data transfer efficiency by accumulating the time (Min Turn Around Time) which has to wait before starting transmission after frame reception.

As shown in FIG. 22 (b), in the UI frame, there are no! /, Nr, and Ns fields present in the I frame. This indicates that the frame is not assigned a serial number, indicating that frame loss detection can not be performed at the LAP layer level, and that it is not possible to set the serial number of the frame to be requested for retransmission. There is. In other words, if the UI frame is used for V transfer, the reliability of upper layer data at the LAP layer level is guaranteed.

[0161] The IrLMP layer on the transmitting side of the frame places data on the upper layer (TinyTP layer) power and IrLM P frame, and also transmits a logical channel (DLSAP: Destination Link Service Access Point) of the transmission destination and transmission. Place the original rational channel (SLSAP: Source Link Service Access Point) as the IrLMP header.

On the other hand, in the IrLMP layer on the side of receiving the frame, the DLS of the received frame from the lower layer is By monitoring the AP field, it is determined which upper layer application data it is, and the received in-frame data is passed to the corresponding upper layer application.

(3) The IrSMP layer divides and combines data of upper layers. Also, as described above, data transfer is performed using the UI frame in the IrLAP layer, and the serial number is not assigned to the frame in the IrLAP layer, and the serial number is assigned to the frame in the IrSMP layer.

Specifically, in the IrSMP layer (hereinafter, SMP (P)) of the primary station, the upper layer data is divided into the maximum data length of the UI frame of the lower layer or less, and then the divided data is divided into a plurality of frames. Deploy and pass to LMP (P). At that time, add a serial number and an end-of-data flag as an SMP header.

FIG. 27 (b) shows a frame format of an SMP frame in the case of IrSimple one-way communication.

[0166] The sequence number is incremented by one for each frame. The secondary station monitors the serial number of the received frame and detects the missing frame. If a missing frame or an error is detected, when it is detected, this is notified to OBEX (S).

[0167] A data end flag (DL: Data Last) is a flag indicating whether or not the final data of the upper layer data is included in the frame. If it is included, set it to a value indicating that (DL = 1 in the figure). Also, the IrSMP layer (hereinafter, SMP (S)) of the secondary station combines the received upper layer data, and makes a connection with the OBEX layer (hereinafter, OBEX (S)), which is the upper layer of the secondary station. Once the received data is combined up to a defined data size, the combined data is passed to the upper layer.

Also, in the method of the present invention, in the method according to the present invention, the side receiving the file returns a response (CONTINUE response and SUCCESS response) to the Put command when receiving the Put command reception. Shina!

Further, in the OBEX layer (hereinafter referred to as OBEX (P)) of the primary station, no response from the secondary station is required at the time of Put command transmission. [0171] Next, the flow of data transfer in one-way communication according to the scheme of the present invention will be described.

[0172] When a file transmission request is generated in the primary station OBEX, OBEX (P) passes a Put command as transmission data to TTP (P). In this description, it is assumed that a non-final Put command consists of dataP0, dataP1, dataP2 and dataP3, and a final Put command consists of dataP4, dataP5, dataP6 and dataP7. Since OBEX (P) does not wait to receive a response to the Put command, if there is space in the SMP (P) send buffer, it continuously passes the Put command to SMP (P). When OBEX (P) passes the final Put command to SMP (P), it ends the data transfer by the Put command.

The SMP (P) that has received this divides the transmission data by the maximum data length of the LAP layer which is the lower layer or less. In this description, SMP (P) is divided into dataP0, dataP1, dataP2, and dataP3. Also, in SMP (P), a serial number (Seq) is set to detect frame omission at the secondary station. Also, at the time of final data transmission in the upper layer, DL is transmitted as 1. The SMP frame with the SMP header (DL, SEQ) added by SMP (P) is passed to LMP (P).

[0174] In the LMP (P) that has received this, the LSAP header is added and passed to the LAP (P).

[0175] In the LAP (P) that receives this, data transfer in the UI frame is performed.

[0176] The LAP (S) that receives this passes the upper layer data in the UI frame to the LMP (S).

[0177] The LMP (S) that receives this removes the LSAP header and passes upper layer data to the SMP (S).

[0178] The SMP (S) that has received this detects a drop in the SMP frame by monitoring the serial number, and performs combining for upper layer data without a frame drop. In this description, since the unit of the data size of the upper layer predetermined with OBEX (S) is the size of the data obtained by combining dataPO and dataP3, when dataP3 is completely connected, the upper layer is determined. Pass combined data to Also, when a frame with DL = 1 is received, it is recognized that all transmission data of the primary station OBEX has been received, and dataP4 notifies data P7 as data to be received to the upper layer.

[0179] The received OBEX (S) analyzes the received data. In this explanation, the primary station does not need a response to the Put command! And don't send SUCCESS response back to the primary station! The data transfer by the Put command in OBEX will be completed when the final Put command is received.

As described above, although retransmission control can not be performed in one-way communication in the communication method of the present invention, it is expected that the response from the Put command is not required in the OBEX layer. If it determines between, it will be possible to communicate without problems. In addition, by adding a serial number in the IrSMP layer, even when a UI frame without a serial number is used, it is possible to detect a frame dropout, and it is possible to appropriately notify the user of a reception error and the like.

(Processing of receiver when data end flag is received)

The processing of the receiver when receiving the data end flag will be described.

[0182] FIG. 29 is a sequence diagram showing data transfer by the OBEX Put command, in which OBEX exists as the upper layer.

[0183] In FIG. 29, the transmitter transmits data3 collectively from dataO by the Put Final command indicating that the final of the OBEX data is included. When transmitting a frame including data3 which is the final data of the Put Final command, the batch transmission end flag is set to 1, and the data end flag is also set to 1.

On the other hand, when the receiver receives a frame having the batch transmission end flag and the data end flag set to 1, it passes the received data to the upper layer and there is no error in the received data up to that point, so there is no error flag. As an error-free meaning, reply. After that, at the receiver, the lower layer is notified of the SUCCESS response that means reception success from the upper layer OBEX, but at the time of notification reception, transmission is suspended because the receiver does not have the transmission right.

[0185] Next, the transmitter receives a frame indicating that the no error flag indicates no error, and the receiver recognizes that the communication was successful without error. Since the transmitter must receive a SUCCESS response from the opposite station, the transmitter again Send a frame to pass the transmit right to the receiver. In FIG. 29, since there is no data to be transmitted from the transmitter at this time, the batch transmission end flag is set to 1, and no data is arranged in the user data area (data = NULL), and the frame is It is sending. [0186] Next, when the receiver receives this, it transmits a SUCCESS response that was pending transmission.

[0187] Thereafter, the transmitter receives this and passes the received data (SUCCESS response) to the upper layer OBEX, whereby the communication at the upper layer OBEX level is completed.

Here, a communication example will be described in which a frame including an error-free flag and a frame including SUCCESS are grouped into one and transmitted under the same conditions as described above.

[0189] FIG. 30 is a sequence diagram showing an example of communication in which a receiver collectively transmits a frame including an error-free flag and a frame including SUCCESS into one.

As shown in FIG. 30, when the receiver receives a frame of batch transmission end flag and data end flag power, there is no error immediately after the lower layer passes the received data to the upper layer. The lower layer does not generate and transmit a frame with no error flag, and the lower layer waits for the SUCCESS response of upper layer power, arranges the above-mentioned no error flag and SUCCESS response in one frame, and transmits it. ing.

[0191] By doing so, as shown in FIG. 29, the transmitter does not have to transmit a frame for moving the transmission right after the receiver transmits a frame including only an error-free flag. Also, in the receiver, since the lower layer can immediately transmit the SUCCESS frame after the upper layer generates the SUCCESS response transmission request, communication efficiency can be improved. In addition, since there is no frame for moving the transmission right, there is no need to consider the processing of an error that occurs in the frame for moving the transmission right, so the process can be simplified.

Subsequently, each embodiment of the communication system of the present invention will be described with reference to FIGS. 1 to 8 and 31 to 67 (however, FIG. 52, FIG. 53, FIG. 58, and FIG. It is as follows when it explains based on). That is, according to the present invention, a communication having a primary station and a secondary station that represents certain information with a predetermined capacity as a group, such as image data and document data, and transmits and receives transfer data to be transferred. Applicable to the system. Here, the predetermined data capacity is variable depending on transfer data.

In each of the following embodiments, the present invention will be described by taking an IrDA-based transfer method (transmission method) for transferring transfer data by infrared rays as an example. First Embodiment of the Embodiment

The transfer data transfer system (communication system) according to the first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The terms (including members and functions) defined in the other embodiments are also used in the present embodiment according to the definition unless otherwise specified.

FIG. 1 is a block diagram showing a configuration of a primary station in the present embodiment. As shown in FIG. 1, the primary station (transmitting apparatus) 1 includes a CPU 11, a memory 12, a controller 13, a transmitter 14, and a receiver 15.

The CPU 11 performs predetermined arithmetic processing in accordance with a user's instruction input to an operation unit (not shown). As the predetermined arithmetic processing, there is transfer processing of transfer data. When the CPU 11 receives a transfer instruction of transfer data from the operation unit, the CPU 11 stores transfer data to be transferred in the memory 12 and makes a transfer request to the controller 13. Further, when the CPU 11 receives a transmission end notification from the controller 13 indicating that transmission of transfer data is completed, the CPU 11 completes the transfer processing.

The memory 12 temporarily stores transfer data to be transferred, and the CPU 11 writes the transfer data. The controller 13 controls transfer of transfer data in response to a transfer request from the CPU 11 and notifies the CPU 11 of the analysis result of the received frame. The controller 13 includes a control unit 131, a transmission frame generation unit 132, and a reception frame analysis unit 133.

Further, the transmission frame generation unit 132 includes a data read unit 1321, a frame serial number addition unit (serial number addition unit) 1322, a transmission right transfer flag addition unit (transmission right transfer flag addition unit) 1323, a frame construction unit 1324 and An error detection or correction code adding unit 1325 is provided.

Further, received frame analysis section 133 is provided with retransmission request determination section 1331 and frame serial number extraction section 1332.

[0200] When the control unit 131 receives a transfer request from the CPU 11, the control unit 131 requests the data reading unit 1321 to read out the data, notifies the frame serial number adding unit 1322 of the serial number, and the transmission right transfer flag adding unit 1323. A notification as to whether or not to transfer the transmission right to the other station Do knowledge. At this time, the control unit 131 controls the frame length and the frame interval by controlling the data length read by the data reading unit 1321 and the reading interval. The control unit 131 controls the frame length so that the data capacity that can be detected by the error detection or correction code adding unit 1325 described later is equal to or less than the required maximum frame length.

Also, the control unit 131 detects that all frames corresponding to the transfer data read from the memory 12 have been transmitted from the transmitter 14, and indicates that transmission of the transfer data has ended. Send an end notification to the CPU 11.

Frame construction unit 1324 performs transfer of the transmission right notified from data transmission unit 1323, the data received from data reading unit 1321, the frame serial number notified from frame serial number addition unit 1322, and the transmission right notified from transmission right transfer flag addition unit 1323. Generate a frame based on the information of whether or not. The transfer rate of the frame generated by the frame construction unit 1324 is controlled by the control unit 131.

Also, the frame construction unit 1324 sequentially sends the generated frames to the error detection or correction code addition unit 1325. At this time, the frame construction unit 1324 makes the time interval between each frame equal to the frame interval received from the control unit 131.

The error detection or correction code addition unit 1325 adds an error detection code (or a correction code) to the frame generated by the frame construction unit 1324 and sends the frame to the transmitter 14 in the subsequent stage. The error detection or correction code adding unit 1325 causes the error detection code (or correction code) to be included in the FCS in the frame.

The error detection code is, for example, a cyclic code such as a cyclic redundancy check (CRC) code, and the correction code is, for example, a parity check code, a gray scale code, a BCH code such as a reed Solomon code, etc. It is. The CRC code is set, for example, at 4 bytes, and the data capacity is limited so that it can be detected by the 4 bytes.

[0206] The transmitter 14 transmits a plurality of frames received from the controller 13 to the outside at predetermined time intervals via an infrared communication path. Also, the receiver 15 sequentially sends response frames received from the secondary station to the received frame analysis unit 133 in the controller 13.

In the received frame analysis unit 133, the secondary station retransmits the frame received from the receiver 15 in the retransmission request determination unit 1331 and the frame serial number extraction unit 1332 respectively. The control unit 131 is notified of the force requested and which frame the error has been made by extracting the frame number.

[0208] Here, the control unit 131 notifies the CPU 11 whether or not the transmitted frame has an error, and if there is an error, which frame the error has been detected.

In the CPU 11, when an error does not occur, the secondary station instructs the primary station to transfer the transmission right so that a predetermined number of frames can be transmitted to the secondary station again. I will go to the next station. In this way, repeat the same procedure until all file data has been sent.

Also, when a notification indicating that an error has occurred is received, the number of frames transmitted before transfer of the transmission right is retransmitted in the same procedure as described above. Here, when the CPU 11 is notified of a frame number in which an error has occurred, it may retransmit the number frame.

Next, a secondary station of the present embodiment will be described with reference to FIG. FIG. 2 is a block diagram showing the configuration of the secondary station. As shown in FIG. 2, the secondary station (reception device) of the present embodiment includes a CPU 21, a memory 22, a controller 23, a receiver 24, and a transmitter (transmission means) 25. .

The receiver 24 receives the frame transmitted from the primary station via the infrared communication path, and sends the received frame to the controller 23. The controller 23 performs predetermined control processing based on the frame received from the receiver 24. The controller 23 includes a control unit 231, a frame processing unit 232, an error detection or correction circuit 233, an error frame number holding unit 234, a response frame generation unit (response frame generation means) 235, and an error detection or correction code addition unit. I will have 236.

[0213] The frame processing unit 232 receives the frame from the receiver 24 and extracts the data field, the transmission right transfer flag, the frame serial number and the FCS portion. That is, the frame processing unit 232 extracts the information contained in the data field of the frame received by the receiver 24, the transmission right transfer flag, the frame serial number of the received frame, and the error detection code (or correction code) for the information. Do. The frame processing unit 232 transmits the extracted information and the error detection code (or correction code) to the control unit 231, the error detection or correction circuit 233, and the error. Send to one frame number holding unit 234.

For example, when the frame processing unit 232 receives a frame, the frame processing unit 232 extracts and extracts transmission data, a transmission right transfer flag, a frame serial number, and an error detection code (or a correction code) included in the frame. The transmission data, the transmission right transfer flag, the serial number of the frame and the error detection code (or correction code) are sent to the control unit 231, the error detection or correction circuit 233 and the error frame number holding unit 234. The error detection or correction circuit 233 performs error detection (or correction) on the received information, and sends the result to the control unit 231 and the error frame number holding unit 234.

The control unit 231 performs predetermined processing in accordance with the result sent from the error detection or correction circuit 233. That is, when the result from the error detection or correction circuit 233 indicates that there is no error (error) in the received data, the control unit 231 writes the received data in the memory 22 and notifies the CPU 21 of the reception completion. I do.

On the other hand, when the result from the error detection or correction circuit 233 indicates that there is an error in the received data, the control unit 231 discards the received data, and an error is detected from the error frame number holding unit 234. The frame number that has occurred is read out, and the fact that there is a reception error and the number of the frame in which the error has occurred are notified to the CPU 21. Further, based on the transmission right transfer flag extracted by the frame processing unit 232, the control unit 231 also performs notification of whether or not the transmission right has been transferred.

The memory 22 is used by the receiver 24 to store the received data, and the control unit 231 writes the received data to which no error has occurred.

The CPU 21 performs processing in accordance with the notification from the control unit 231. That is, when the control unit 231 is notified that the transfer right of the control unit 231 has been transferred, if there is no error in all the frames received up to that time, all the received data stored in the memory 22 is used. Then, predetermined post-processing for received data is performed, and the control unit 231 is notified of transmission to the effect that a response frame to the effect that all frames have been normally received is returned to the primary station. When the control unit 231 is notified that transfer right has been transferred, the control unit 231 is notified if an error has occurred in a frame received up to that time. Since an error has occurred, a transmission notification is issued to request retransmission. Also here, the error is It also notifies the frame number of the generated frame.

When the control unit 231 receives a transmission request from the CPU 21, the control unit 231 notifies the response frame generation unit 235 that a response frame is to be generated. Here, information on whether or not there is an error in the received frame and notification of the frame number of the error frame when there is an error are also performed.

The response frame generation unit 235 generates a response frame based on the notification from the control unit 231, and sends the frame to the error detection or correction code addition unit 236. The error detection or correction code addition unit 236 adds an error detection or correction code to the frame generated by the response frame generation unit 235 and sends the frame to the transmitter 25. The transmitter 25 transmits the frame received from the error detection or correction code adding unit 236 to the outside via the infrared communication path.

[0221] In FIG. 3, the UI frame and the response (response) frame to the UI frame, the frame serial number, a flag indicating whether or not to transfer the transmission right to the opposite station, and an error or error in the frame received so far The frame configuration is shown when a flag is added to indicate whether the frame is missing or not. However, the frame configuration shown here is merely an example, and the present invention is not limited to this.

Here, a 3-byte parameter is added to the UI frame and the response frame to the UI frame, a flag indicating whether or not to transfer the transmission right to the opposite station, and an error occurs in the received frame used by the secondary station. A flag indicating whether it was a force and the remaining 22 bits consist of a frame serial number.

Hereinafter, a flag indicating whether to transfer the transmission right to the opposite station is BL, a flag indicating whether the received frame used by the secondary station has an error is RS, and a serial number of the frame is S. Ru. Hereinafter, it will be described how data transfer is performed between the primary station and the secondary station using this frame configuration.

Procedures of data transfer processing in the primary station and the secondary station will be described with reference to the signal sequence diagrams of FIG. 4 and FIG. Note that Fig. 4 shows the case where all received data in two-way communication is forceless and no errors occur! /.

First, in the primary station, the CPU 11 that has received the transfer instruction from the operation unit The transmission data is stored in the memory 12 and a transfer request is output to the controller 13. Here, it is assumed that the transfer right is transferred to the secondary station in units of n frames. In addition, S, BL, and RS shown in Fig. 4 and Fig. 5 respectively indicate a frame serial number, a flag indicating whether transfer right is to be transferred, and a flag indicating whether re-transmission is necessary.

The primary station first transmits n frames (serial numbers from S = 0 to S = n−1) to the secondary station via the infrared communication path. Here, since the transmission right is transferred in units of n frames, frame transmission is performed with BL = 1 for frames of S = n−1.

The secondary station sequentially receives frames S = 0 to S = n−1 transmitted by the primary station. After that, if reception is completed without errors in the n received frames, RS = 1 is set for the primary station, meaning that no error-free retransmission is required in the received frame. Send a response frame.

[0228] When the primary station receives a response frame indicating that the n frames transmitted from the secondary station have been normally received, the same process as described above is performed. Also, the secondary station performs the same processing as the above processing, and the CPU receiving no notification of reception completion without error in all the received frames performs predetermined received data post-processing based on the received data.

Next, procedures of data transfer processing in the primary station and the secondary station will be described with reference to the signal sequence diagram of FIG. FIG. 5 shows the case where an error occurs during frame communication in two-way communication.

[0230] Here, it is assumed that the transfer right is transferred to the secondary station in units of n frames. Also, as in FIG. 4, S, BL, and RS are a frame serial number, a flag indicating whether to transfer the transmission right, and a flag indicating whether retransmission is necessary.

Here, it is assumed that the secondary station detects that there is an error in frame 1 in which no error occurs in frame 0. When the secondary station receives a frame from the primary station indicating that the flag indicating delegation of the transmission right means delegation, the primary station validates the flag indicating that an error has occurred in the received frame and makes the frame Send At the primary station, the secondary station It receives a frame indicating that an error has occurred, detects that an error has occurred, and retransmits the frame in which the error occurred.

Second Embodiment of the Embodiment

In this embodiment, a modification of the first embodiment will be described. The terms (including members and functions) defined in the other embodiments are also used in the present embodiment in accordance with the definitions, unless otherwise specified.

In the first embodiment described above, the power of the primary station performs transfer of the transmission right with the secondary station every n frames. Here, connection establishment is established when the connection performed by the IrDA communication system is established. Sometimes, the number of frames that each station can transmit and receive at one time means in the connection request frame transmitted by its own station as the primary station and the connection response frame transmitted from the opposite station as the secondary station to the station. A field is added and frame exchange is performed, and the optimum number of frames is calculated with reference to the number of frames that can be received at the other station received at each station at one time, and transfer right is transferred according to the number of frames. Explain about The above number of frames can be set to any number.

[0235] In the IrDA communication system, the primary station requests the secondary station to establish a data transfer state, and first transmits an SNRM frame. The secondary station receiving this sends back a DM frame if communication is not possible, and if the communication is possible, it returns a UA frame meaning acceptance to the primary station. SNRM frames, DM frames, and UA frames are all in the form of U frames. When the secondary station returns a UA frame, both stations establish data transfer status and data transfer becomes possible.

[0236] In the present embodiment, a connection establishment is performed by adding a parameter indicating the retransmittable data size of the own station to the SNRM frame or UA frame.

According to the above configuration, since the transfer right is always transferred for each number of frames supported between the primary station and the secondary station, the number of frames corresponding to the memory capacity installed in each station is required. It is possible to exchange frames.

FIG. 6 is a block diagram showing a configuration of a transmission / reception circuit used in the communication system according to the present embodiment. As shown in FIG. 6, the transmission / reception circuit of this embodiment includes a CPU 61, a controller 62, a transmitter 63, and a receiver 64. When the CPU 61 receives an instruction to connect to the other station of the user input to the operation unit (not shown), the CPU 61 sends a connection request to the controller 62. The controller 62 controls connection processing in response to a connection request from the CPU 61. The controller 62 includes a control unit 621, a transmission frame generation unit 622, and a reception frame analysis unit 623.

Further, the transmission frame generation unit 622 is provided with a connection establishment frame generation unit 6221 and a number-of-retransmittable-frames addition unit 6222. The control unit 621 receives the connection request from the CPU 61 and the notification of the number of retransmittable frames, requests the connection establishment frame generation unit 6221 to generate a connection request frame, and sends the retransmittable frame number addition unit 6222 The number of retransmittable frames notified from the CPU 61 is notified.

The connection establishment frame generation unit 6221 generates a connection request frame, and the retransmittable frame number addition unit 6222 adds a field indicating a retransmittable frame to the generated connection request frame, and sends the transmitter 63 Send to The transmitter 63 transmits the frame received from the transmission frame generation unit 622 through the infrared communication channel.

In the transmission / reception circuit, after transmitting the connection request frame, the receiver 64 receives a connection response (response) frame from the secondary station which is the opposite station. Receiving the connection response frame, the receiver 64 sends the received frame to the received frame analysis unit 623 in the controller 62.

The reception frame analysis unit 623 includes a frame analysis unit 6231 and a retransmittable frame number detection unit 6232. The frame analysis unit 6231 analyzes the received frame and notifies the control unit 621 of the response result of the opposite station to the connection request of the own station.

[0244] Further, the number-of-retransmittable-frames detecting unit 6232 extracts a field indicating the number of retransmittable frames from the received frame, and notifies the control unit 621 of the extracted field.

The control unit 621 can know the maximum number of retransmittable frames in both stations by comparing the notification result from the reception frame analysis unit 623 with the number of retransmittable frames of the own station, and as a result To the CPU 61.

When the CPU 61 receives the result and performs data transfer, it transmits the transmission right to the opposite station by the method described in the first embodiment for each maximum number of retransmittable frames in both stations. It will be good if it transfers.

Also, here, we describe the procedure for the primary station to know the maximum number of retransmittable frames of both stations. However, in the secondary station as well, the number of retransmittable frames in the connection request frame received by the primary station is also compared with the number of retransmittable frames of the own station, the maximum number of retransmittable frames of both stations. I will omit the explanation here because I can know.

[0248] FIG. 7 shows a frame configuration when the SNRM frame or the UA frame is added with a parameter indicating the retransmittable data size of the own station. However, the frame configuration shown here is an example, and the present invention is not limited to this.

Here, a 1-byte parameter is added, each bit indicates the retransmittable data size of its own station, and each station sets all bits indicating the data size supported by its own station to 1. Exchange frames. In the example shown here, bit 0 means lByte, bit 1 is 2B yte, bit 2 is 3 Byte, bit 3 is 4 Byte, bit 4 is 8 Byte, bit 5 is S6 6 Byte, bit 6 is 32 Byte and bit 7 is 64 Byte I assume.

[0250] Both stations may transfer the transmission right of the frame within the receivable data size of the opposite station that can obtain the parameter power of the opposite station based on the received frame respectively.

[0251] FIG. 8 is a signal sequence diagram showing exchange of frames in the embodiment of the present invention. Here, it is assumed that the primary station is the retransmittable data size strength Byte, and that the secondary station is 3 Bet e. In the frame configuration shown in FIG. 7, the primary station adds the data of "00001111" to the SNRM frame and transmits the SNRM frame because the size is the retransmittable data size Byte.

Further, since the retransmittable data size of the secondary station is 3 bytes, in the frame configuration shown in FIG. 7, the data of “00000111” is added to the UA frame to transmit the UA frame. Since the primary station knows that the maximum receivable data size of the secondary station is 3 bytes, in the subsequent frame transmission, the primary station uses three frames by using the method described in the first embodiment. Transfers the transmission right to the other station each time it transmits.

Third Embodiment of the Embodiment

A data transfer system (communication system) according to a third embodiment of the present invention relates to a system that performs communication using hierarchical communication protocols. As to terms (including parts and functions) defined in other embodiments, this is a book unless otherwise stated. Also in the embodiment, it shall be used according to the definition.

The data transfer system according to the present embodiment is described below with reference to FIGS. 12 to 17.

[0255] FIG. 12 is a block diagram showing a configuration of a station (primary station (transmitting apparatus) or secondary station (receiving apparatus) according to the present embodiment. Further, FIG. 13 shows a protocol stack of the data transfer system in the present invention. In FIG. 13, the function of the present embodiment is realized by the communication protocol layer located in the TinyTP layer of the IrDA protocol stack, and the communication protocol layer is hereinafter referred to as an SMP (Sequence Management Protocol) layer. Of course, the protocol stack for realizing the communication system according to the present invention is not limited to this.

As shown in FIG. 12, the station 12 which is a primary station or a secondary station includes an application layer processing unit 121, an OBEX layer processing unit 122, an SMP layer processing unit 123, and an IrLMP layer processing unit 124. The IrL AP layer processing unit 125, a transmitter 126, and a receiver 127 are provided.

The application layer processing unit 121, the OBEX layer processing unit 122, the SMP layer processing unit 123, the IrLMP layer processing unit 124, and the IrLAP layer processing unit 125 have a hierarchical structure in this order. It is a block that implements the functions of multiple types of communication protocols.

The function of each block at the time of transmitting a request frame to the secondary station in the primary station will be described as follows.

The application layer processing unit 121 issues a request frame for communication with the outside to the OBEX layer processing unit 122 according to the user's instruction input to the operation unit (not shown). Notify (control). Further, when receiving the notification that the response frame has been received from the OBEX layer processing unit 122, the application layer processing unit 121 performs predetermined processing in response to the received response frame.

In response to the request from the application layer processing unit 121, the OBEX layer processing unit 122 notifies (controls) generation of a request frame and issuance of the request frame to the SMP layer processing unit 123. Also, in response to the response frame from the SMP layer processing unit 123, the reception result is notified to the application layer processing unit 121.

The SMP layer processing unit 123 includes a control unit 1231, a transmission frame generation unit 1232 and a reception frame. And an analysis unit 1233.

Further, the transmission frame generation unit 1232 includes a response frame request flag addition unit 12321, a frame serial number addition unit (serial number addition unit) 12322, and a transmission right transfer flag addition unit (transmission right transfer flag addition unit) 12323 And a retransmission request flag addition unit (response frame generation means) 12324 and a frame construction unit 12325.

Further, the reception frame analysis unit 1233 includes a response frame request flag determination unit 12331, a frame serial number analysis unit 12332, a transmission right transfer flag determination unit 12333, a retransmission request determination unit 12334, and an upper layer data extraction unit. And 12335.

When the control unit 1231 receives the transfer request from the OBEX layer processing unit 122, the control unit 1231 notifies the frame serial number addition unit 12322 of the serial number of the transmission frame, and the transmission right transfer flag addition unit 1232 To notify of the power or not. Further, the control unit 1231 controls the response frame request flag adding unit 12321 according to whether the transfer request from the OBEX layer processing unit 122 requests the response frame or not. Further, in the present embodiment, since the primary station does not make a retransmission request, retransmission request flag adding section 12324 does not need to perform any particular control. When the primary station makes a retransmission request, the retransmission request flag adding unit 12324 adds a retransmission request flag.

In the frame construction unit 12325, for the request frame received from the OBEX layer processing unit 122, the upper layer notified of the response frame request flag addition unit 12321 requests a response frame for the transmission frame, Information indicating whether or not to transmit, the serial number of the frame notified from the frame serial numbered caro unit 12322, and the information notified from the transmission right transfer flag adding unit 12323 indicating whether to transfer the transmission right or not. The header information is generated based on the information indicating whether or not to make a retransmission request from the retransmission request flag adding unit 12324 (however, the primary station does not always make a retransmission request, so it is always a fixed value), and the header information To build a frame. Then, the frame construction unit 12325 outputs the constructed frame to the IrLMP layer processing unit 124 which is the lower layer.

[0266] The IrLMP layer processing unit 124 adds predetermined header information to the received request frame to generate a frame, and outputs the frame to the IrLAP layer processing unit 125 which is a lower layer.

Similarly, in the IrLAP layer processing section 125, predetermined header information is added to the received request frame. An additional frame is generated and output to the transmitter 126.

[0268] The transmitter 126 transmits a plurality of frames received from the IrLAP layer processing unit 125 to the outside at predetermined time intervals via an infrared communication path.

[0269] Next, the operation of each block at the time of receiving the response frame to be transmitted by the secondary station at the primary station will be described as follows.

When the receiver 127 receives the response frame transmitted from the secondary station via the infrared communication path, the receiver 127 outputs the received response frame to the IrLAP layer processing unit 125.

The IrLAP layer processing unit 125 and the IrLMP layer processing unit 124 analyze the received response frame power header information, perform predetermined processing based on the header information, and remove the header information, and the upper layer Response frame is passed! /.

The SMP layer processing unit 123 receives the response frame from the lower layer IrLMP layer processing unit 124, and analyzes the response frame in the reception frame analysis unit 1233.

The transmission right transfer flag determination unit 12333 refers to the BL (described later) bit of the received frame and notifies the control unit 1231 of the determination result as to whether or not the transmission right is being transferred.

In addition, retransmission request determination section 12334 refers to the RS (described later) bit of the received frame, and when the retransmission request is made from the opposite station, notifies control section 1231 of the determination result as to whether or not it has power. Ru.

Frame serial number analysis unit 12332 extracts a frame number from the received frame, and outputs the frame number to control unit 1231.

[0276] In response to the notification of the determination result from retransmission request determination unit 12331, control unit 1231 also retransmits the frame power of the serial number notified from frame serial number analysis unit 12332 if the other station requests retransmission. The transmission frame generation unit 1232 is controlled to perform. Also, if the determination result from the retransmission request determination unit 12331 indicates that the opposite station has not requested retransmission, the transmission is completed and the frames are sequentially transmitted.

Also, the upper layer data extraction unit 12335 removes the header information of the SMP layer from the frame received from the lower layer (here, the IrLMP layer processing unit 124), and the upper layer (here, the OBE X layer processing). Output data to the part 122).

Thus, the primary station transfers data to the secondary station in the above-described procedure until transmission data is completely transmitted. Data transfer.

[0279] Next, the operation of each block at the time of receiving a request frame in which the primary power is also transmitted at the secondary station will be described as follows.

As in the primary station, also in the secondary station, the receiver 127 receives a request frame to which the next station power is also transmitted, and the IrLAP layer processing unit 125 and the IrLMP layer processing unit 124 respectively analyze the header information, Header information is removed and the request frame is passed to the upper layer.

In the SMP layer processing unit 123, when the request frame is passed from the IrLMP layer processing unit 124, the reception frame analysis unit 1233 analyzes the reception frame.

Frame serial number analysis unit 12332 extracts the frame serial number from the received frame, checks the serial number of the received frame, and determines whether the result is normal or abnormal (frame missing etc.). Notify 1231. Also, when there is an error, the control unit 1231 is notified of the serial number of the frame in which the error occurred (retransmission, frame number).

Also, the transmission right transfer flag determination unit 12333 refers to the BL (described later) bit of the received frame and notifies the control unit 1231 of the determination result as to whether or not the transmission right is transferred.

Further, the response frame request flag determination unit 12331 refers to the DL (described later) bit of the received frame and determines the result of determination as to whether the DL bit requests the response frame of the upper layer or not. To notify.

Based on the determination result notified from transmission right transfer flag determination unit 12333, control unit 1231 indicates that the determination result indicates that the transfer right of the other station has been transferred. The transmission frame generation unit 1232 controls (notifies) the transmission frame generation unit 1232 to generate and transmit a response frame.

At this time, if an error of the frame serial number is generated based on the analysis result of the frame serial number analysis unit 12332, the control unit 1231 requests the retransmission request flag addition unit 12324 to make a retransmission request. It indicates that the flag is set as shown, and an error notified from the frame serial number analysis unit 12332 occurs to the frame serial number addition unit 12322. Indicate the frame serial number.

Further, when the analysis result of the frame serial number analysis unit 12332 indicates that no error has occurred, the control unit 1231 does not make a retransmission request to the retransmission flag addition unit 12324 and normally receives it. Informs you to set a flag to indicate that it is complete.

However, in the control unit 1231, when the determination result of the response frame request flag determination unit 12331 indicates that the response frame of the upper layer is requested, the OBEX layer processing unit 122 prepares the response frame. The response frame is not sent back until the completion of the response frame, and when it is notified from the OBEX layer processing unit 122 that the response frame has been prepared, the transmission frame generation unit 1232 is instructed to generate the response frame. The transmission frame generation unit 1232 adds predetermined header information to the response frame received from the OBEX layer processing unit 122 to construct a frame, and outputs the frame to the IrLMP layer processing unit 124 which is a lower layer.

Also, the response layer may be generated and transmitted in the SMP layer processing unit 123 until the preparation of the response frame is completed by the OBEX layer processing unit 122. However, in this case, the control unit 1231 controls the transmission right transfer flag addition unit 12323 not to transfer the transmission right to the primary station, and controls to generate a transmission frame. Then, when receiving the notification from the OBEX layer processing unit 122 that the preparation of the response frame is completed, the transmission frame generation unit 1232 is instructed to generate a response frame. Also, at this time, the transmission right transfer flag addition unit 12323 is controlled to set a flag so as to transfer the transmission right to the primary station. The transmission frame generation unit 1232 adds predetermined header information to the response frame received from the OBEX layer processing unit 122 to construct a frame, and outputs the frame to the Ir LMP layer processing unit 124 which is a lower layer.

The transmission frame generation unit 1232 generates a response frame according to the control from the control unit 1231, and outputs the generated response frame to the IrLMP layer processing unit 124 which is the lower layer.

Thus, in the secondary station, transmission of a response frame to the request frame from the primary station is performed each time transfer of the transmission right is performed from the primary station.

[0291] FIG. 14 shows a UI frame and a response (response) frame to the UI frame, a frame serial number, a flag indicating whether or not to transfer the transmission right to the opposite station, an error or a frame in the frame received so far A flag indicating if it has been missed and the primary station This figure shows the frame configuration when the upper layer gives a flag indicating whether the response frame to the request frame requires a response frame or not. However, the frame configuration shown here is only an example and is not limited to this.

Here, a 3-byte header is added to the UI frame and the response frame to the UI frame, and a flag indicating whether to transfer the transmission right to the other station, the upper layer of the primary station responds to the request frame A frame is requested and a flag indicating whether or not there is a power, a flag indicating whether or not the received frame used by the secondary station has an error, and the remaining 21 bits are configured as the serial number of the transmission frame.

[0293] Hereinafter, a flag indicating whether the upper layer of the primary station requests the response frame to the request frame is DL, a flag indicating whether to transfer the transmission right to the opposite station is BL, and the secondary station Let RS be a flag indicating whether the received frame used has errors or not, and let S be the serial number of the frame.

Hereinafter, how data is transferred between the primary station and the secondary station configured according to the present embodiment will be described using FIG. 15 using this frame configuration. .

FIG. 15 shows the case where no error occurs in all received data in two-way communication.

First, in the primary station, the request layer transfer request is notified from the application layer processing unit 121 according to the user's instruction input to the operation unit (not shown), and the OBEX layer processing unit 122 is a lower layer. Output request frame to SMP layer.

Here, it is assumed that the transfer right is transferred to the secondary station in units of n frames. In addition, S, DL, BL, and RS shown in FIG. 15 respectively transfer the serial number of the frame, a flag indicating whether the upper layer of the primary station requests a response frame to the request frame, and transfer right of transmission. It is a flag indicating whether or not it is a flag indicating whether or not to make a retransmission request.

[0298] The SMP layer divides the transferred data transferred to the upper layer OBEX layer into predetermined data sizes, assigns a serial number, and outputs the data to the lower layer IrLMP layer. Here, since it is assumed that the transmission right is transferred in units of n frames, the frame of 3 =! 1-1 is set to 81 ^ = 1 and the data is output to the lower layer. [0299] The IrLMP layer and the IrLAP layer, which are lower layers of the SMP layer, add a header sequentially to the frame which also receives the SMP layer force, and send the frame to the secondary station through the infrared communication path. Send

[0300] On the other hand, the secondary station receives a frame from the primary station via the infrared communication path. The secondary station analyzes the header information sequentially from the received frame in the IrLAP layer and the IrLMP layer which are lower layers of the SMP layer, removes the header information, and outputs data to the upper layer.

[0301] The SMP layer receives an IrLMP layer frame, which is a lower layer, and analyzes header information (3 bytes in this case) of the received frame. Then, based on the frame serial number in the header information, an error such as a missing frame occurs and checks whether there is an error or not. If no error occurs, the header information is removed and the OBEX layer (upper layer) Pass the data to the However, for a frame of S = n -1, BL = 1 and DL = 0, so the transmission authority is delegated from the primary station, and the response of the OBEX layer, which is the upper layer, is not necessary. Therefore, the SMP layer sends a response frame with RS = 1, which means that no error-free retransmission is required in the received n frames.

[0302] When the primary station receives a response frame indicating that the n frames transmitted from the secondary station have been correctly received, it performs the same processing as the above processing, and transmits the next n frames. Similarly, when the secondary station receives the next n frames and receives the frame of the BL = 1 frame (S = m-1 in the figure), it indicates that the n frames have been successfully received. Send a response frame back to the primary station.

Thus, while the primary station sequentially transfers the transmission right to the secondary station every n frame units, the power of performing frame transmission is BL = 1, DL = 1 in the final frame of the transferred data. As the upper layer of the primary station requests the response frame for the request frame, it performs transmission. Here, the DL bit can be used in combination with a force that is used as a flag to indicate that the upper layer of the primary station requests a response frame to the request frame, and a flag of another meaning. It is. For example, in the case of the example shown in FIG. 15, it is also possible to treat it as a flag that means the last frame of transfer data.

[0304] The SMP layer of the secondary station that has received a frame with BL = 1 and DL = 1 is an upper layer because DL = 1. It notifies the OBEX layer that a response frame to the received request frame is required. In the OBEX layer, after receiving notification from the SMP layer, all data has been successfully received, so a request to transmit a response frame is made to the SMP layer, and a response frame is passed. In response to the response frame transmission request from the OBEX layer, the SMP layer sets header information in the response frame received from the OBEX layer (here, RS = 1 to indicate that retransmission is necessary!). , BL = 1 and DL = 1), and pass data to the lower layer IrLM P layer. The IrLMP layer and the IrLAP layer, which are lower layers, add predetermined header information to the data that is also transferred to the upper layer as well, and pass the response frame to the lower layer, and the IrLAP layer passes the response frame via the infrared communication path. Sends a response frame to the primary station.

The secondary station receives the transmitted response frame, sequentially analyzes and removes header information from the lower layer, and delivers data to the upper layer. Then, the OBEX layer, which is an upper layer of the SMP layer, receives the OBEX response frame transmitted from the secondary station, and can recognize that the upper layer of the SMP layer of the primary station has also successfully completed the data transfer. It becomes.

FIGS. 16 and 17 are signal sequence diagrams showing a data transfer procedure when an upper layer authentication request is issued at the time of authentication or the like.

[0307] As shown in FIG. 16, with respect to the authentication frame to which upper layer power is also transferred, header information of DL = 0 and BL = 1 is added in the SMP layer, and data is transmitted to the secondary station. When transfer is performed, the secondary station receives a frame with BL = 1 and the transmission right is delegated from the primary station, and since DL = 0, the secondary station responds without waiting for a response from the upper layer. Because the response frame of the upper layer of the secondary station can not be sent back, the authentication between the two stations will not be completed.

On the other hand, in the configuration according to the present embodiment, when the authentication frame is transmitted to the secondary station with DL = 1, the upper layer responds as DL = 1 in the SMP layer of the secondary station. When the frame is prepared, header information is added to the response frame passed from the upper layer and the response frame is sent back to the authentication frame, so that the upper layer authentication between both stations is completed. [0309] Also, as shown in FIG. 17, when a packet with DL = 1 and BL = 1 is received, the SMP layer requests the response frame to the request frame received to the upper layer OBEX layer. It is possible to send a response frame at the SMP layer level first. However, in this case, reply with BL = 0 so as not to transfer the transmission right to the other station. Then, when the transmission of the response frame in the OBEX layer is completed, the header information of the SMP layer is added to the response frame of the OBEX again, and the response frame is returned.

[0310] By doing this, the SMP layer of the primary station receives the response frame at the SMP layer level (OBEX layer's response frame) before the response frame is prepared in the OBEX layer of the secondary station and the force response frame is returned. Response frames are included and can receive! /! As a result, since the SMP layer of the primary station can know whether or not the partner station has successfully received the frame before the response frame from the OBEX layer is sent back, the next data transfer is performed in advance. You can prepare for the

In each of the above embodiments, the transmitter (primary station) and the receiver (secondary station) are not limited to a power CPU configured to include a CPU, and may have an arithmetic processing function such as a microcomputer. It may be connected.

In each of the above-described embodiments, the controller transfers the transfer data in response to an instruction from the CPU. However, the controller may transfer the transfer data by DMA (direct memory access) without intervention of the CPU. In this case, transfer data can be transferred from memory that does not receive CPU power instructions. This can reduce the CPU load.

Fourth Embodiment of the Embodiment

The transfer data transfer system (communication system) according to the fourth embodiment of the present invention is described below with reference to FIG. 31 to FIG. The terms (including members and functions) defined in the other embodiments are also used in this embodiment according to the definitions, unless otherwise specified.

This embodiment will be described with reference to FIG. 31 as a block diagram of a transmitter, FIG. 32 as a block diagram of a receiver, and FIG. 33 as a sequence diagram of signals.

[0315] FIG. 31 is a block diagram of a transmitter 2001 according to the present embodiment. Note that Figure 31 This is an example of the configuration of the receiver, and is not limited to this. In addition, each component circuit may be software or hardware. The following explains each component.

The transmitter 2001 is a device that transmits transmission data. Here, the transmission data may be, for example, text data, image data and the like.

As shown in FIG. 31, a transmitter (primary station, client device) 2001 includes a control unit (control means) 2002, a memory (storage means) 2003, a batch transmission final flag generation circuit (collective transmission final flag generation) Means) 2004, serial number generation circuit (serial number generation means) 2005, transmission frame generation circuit (transmission frame generation means) 2006, transmission unit (transmission means) 2007, reception unit (reception means) 2008, reception frame analysis circuit (reception Frame analysis means) 2009, no error flag analysis circuit (no error flag analysis means) 2010, error detection circuit (error detection means) 20 11, serial number analysis circuit (serial number analysis means) 2012 comprising.

A control unit 2002 controls each component of the transmitter 2001.

The memory 2003 stores transmission data. This memory 2003 may be volatile memory (for example, SDRAM etc.) or non-volatile memory (for example, flash memory, HDD, DVD etc.). Further, in FIG. 31, the memory 2003 is disposed in the transmitter 2001, but may be connected to the transmitter 2001 as an external memory of the transmitter 2001 which is not necessarily present in the transmitter 2001. .

[0320] The batch transmission final flag generation circuit 2004 means, when transmitting data in a certain unit, the transmitter 2001, when transmitting a frame including the final data of the certain unit. It is a circuit set as a value. In this embodiment, the abbreviation BL (Block Last) is defined, and in the case where BL is 1, it is a frame including the final data of the certain unit, and in the case where BL is 0, The final data of a certain unit is included in the frame.

Also in the sequence diagram of FIG. 33 described later, the abbreviation BL is used in the same meaning. Further, in the present embodiment, even if the force expressed as the batch transmission final flag, for example, the communication confirmation request flag, etc., it has essentially the same meaning as the batch transmission final flag in the present embodiment. Therefore, even if the flag does not necessarily have the same meaning as the batch transmission final flag, it is not limited to this as long as the flag performs the same operation. The serial number generation circuit 2005 is a circuit that increases or decreases the serial number according to a predetermined rule, and assigns it to each transmission frame. In this embodiment, the abbreviation SEQ (Sequence number) is defined, and when SEQ is 1, it is indicated that the serial number is 1. Also in the sequence diagram of FIG. 33, the abbreviation of SEQ is used in the same meaning.

The transmission frame generation circuit 2006 is a circuit that generates a transmission frame according to a predetermined format. The above-mentioned batch transmission final flag BL, serial number SEQ, transmission data are arranged according to a predetermined format to generate a transmission frame. Note that, in the present invention, since a communication method without window size limitation is used, a transmission frame in a frame format without window size limitation is generated. Examples include, but are not limited to, unnumbered information (UI) frames in Ir LAP (Infrared Link Access Protocol). In addition, an error detection code is also added to allow the opposite station to detect an error. The error detection code may be, for example, a cyclic redundancy check (CRC), but is not limited to this. Also, an error correction code may be added.

The transmitting unit 2007 is a circuit for transmitting the transmission frame generated by the transmission frame generation circuit 2006. For example, if infrared light is used as the communication medium, it may be an LED (light emitting diode) or an LD (laser diode), but it is not limited thereto. When another communication medium is used, the transmission unit corresponds to the communication medium.

The receiving unit 2008 is a circuit that receives a frame transmitted by the opposite station. For example, if infrared light is used as a communication medium, it becomes PD (photodiode), but it is not limited to this. When another communication medium is used, the reception unit corresponds to the communication medium.

The reception frame analysis circuit 2009 analyzes the reception frame received by the reception unit 2008. Specifically, the no-error flag in the received frame is extracted and passed to the no-error flag analysis circuit 2010. Also, it extracts the serial number in the received frame and passes it to the serial number analysis circuit 2012. If data is present in the received frame, the data is extracted and stored in the memory 2003 via the control unit 2002. In the case of storing data in the memory 2003, the control unit 2003 may not necessarily be interposed. No-Error Flag Analysis Circuit 2010 analyzes the no-error flag set in the opposite station according to a predetermined format, and notifies the control unit of the analysis result. In the present embodiment, a force expressed as no error flag, for example, an error flag, a retransmission request flag, or a retransmission request no flag may be used.

The error detection circuit 2011 interprets the error detection code attached to the received frame, determines whether or not there is an error in the received frame, and notifies the control unit of the analysis result. The code for error detection may be, for example, a cyclic code such as a CRC (Cyclic Redundancy Check) code. If an error correction code is given, error correction will be performed.

[0329] The serial number analysis circuit 2012 analyzes the received serial number and notifies the control unit 2002 of the analysis result.

[0330] FIG. 32 is a block diagram of a receiver 2101 according to the present embodiment. FIG. 32 is an example of the configuration of the receiver, and the present invention is not limited to this. In addition, each component circuit may be software or hardware. The following explains each component.

The receiver 2101 is a device that receives transmission data from the other device. The transmission data mentioned here is not limited to this, for example, text data, image data and the like.

As shown in FIG. 32, a receiver (secondary station, server device) 2101 includes a control unit (control means) 21 02, a memory (storage means) 2103, and no error flag generation circuit (no error flag generation means 2104, serial number generation circuit (serial number generation means) 2105, transmission frame generation circuit (transmission frame generation means) 2106, transmission unit (transmission means) 2107, reception unit (reception means) 2108, reception frame analysis circuit (reception frame analysis Means) 2109, batch transmission final flag analysis circuit (batch transmission final flag analysis means) 2110, error detection circuit (error detection means) 2111, serial number analysis circuit (serial number analysis means) 2112

The control unit 2102 controls each component of the receiver 2101.

The memory 2103 stores the received data. This memory 2103 may be a volatile memory (for example, SDRAM or the like) or a non-volatile memory (for example, flash memory, HDD, DVD or the like). Also, in FIG. 32, memory 2103 is located in receiver 2101. However, it does not have to be in the receiver 2101 but may be connected to the receiver 2101 as an external memory of the receiver 2101.

The no-error flag generation circuit 2104 is a circuit that generates an no-error flag according to a predetermined format to notify the opposite station whether or not there is an error in the frame received from the opposite station. . In the present embodiment, even if there is an error flag, for example, an error flag, a retransmission request flag, or a retransmission request no flag, the error flag is essentially the same as the error-free flag. There is no limitation to the flag as long as the flag does not have the same meaning as the no flag but the same operation is performed.

[0336] The serial number generation circuit 2105 is a circuit for setting a serial number desired to be retransmitted when making a retransmission request to the opposite station when an error is detected in a frame received so far.

The transmission frame generation circuit 2106 is a circuit that arranges the above-mentioned no-error flag and serial number according to a predetermined format, and generates a transmission frame. For example, in IrL AP (Infrared Link Access Protocol), there may be mentioned (Unnumbered Information; ~ 7 ~ ~) but it is not limited to this.

[0338] The transmitting unit 2107 is a circuit that transmits the transmission frame generated by the transmission frame generation circuit 2106. For example, if infrared light is used as the communication medium, it may be an LED (light emitting diode) or an LD (laser diode), but it is not limited thereto. When another communication medium is used, the transmission unit corresponds to the communication medium.

[0339] The receiving unit 2108 is a circuit that receives a frame transmitted by the opposite station. For example, if infrared light is used as a communication medium, it becomes PD (photodiode), but it is not limited to this. When another communication medium is used, the reception unit corresponds to the communication medium.

The reception frame analysis circuit 2109 analyzes the reception frame received by the reception unit 2108. Specifically, the batch transmission final flag in the received frame is extracted and passed to the batch transmission final flag analysis circuit. It also extracts the serial number in the received frame and passes it to the serial number analysis circuit. If data is present in the received frame, the data is extracted and stored in memory via the control unit. When storing data in memory, the controller You do not have to go through.

The batch transmission final flag analysis circuit 2110 analyzes the batch transmission final flag passed by the reception frame analysis circuit 2109, and notifies the control unit 2102 of the analysis result.

The error detection circuit 2111 interprets the error detection code attached to the received frame, determines whether or not there is an error in the received frame, and notifies the control unit 2102 of the analysis result. Examples of codes for error detection include, but not limited to, cyclic codes such as cyclic redundancy check (CRC) codes. If an error correction code is given, error correction will be performed.

The serial number analysis circuit 2112 analyzes whether or not the serial number given in the received frame is increased or decreased according to a predetermined rule, and notifies the control unit 2102 of the analysis result. For example, when a frame is missed in the communication path, the serial number analysis circuit 2112 determines that an error occurs.

Specifically, when the error detection circuit 2111 detects an error in data, the transmission frame generation circuit 2106 sets an error-free flag to an error, and the serial number of the reception frame at that time is set. Generate a transmission frame that contains. In addition, transmission frame generation circuit 2 106 includes the serial number of the received frame at that time when an error of serial number is detected in error serial number analysis circuit 2112 in which error of data is not detected in error detection circuit 2111. Generate a transmission frame.

[0345] Subsequently, the flow of each signal in the present embodiment will be described with reference to the sequence diagrams of FIG. 31, FIG. 32, and FIG.

[0346] The transmitter 2001 determines the size of data to be transmitted by the control unit 2002 when a transfer request for transmission data is generated from the own device or from outside, and notifies the batch transmission final flag generation circuit 2003 of the size.

The batch transmission final flag generation circuit 2003 internally holds the batch transmission data size, calculates the total size of the data passed from the control unit 2002 or the memory 2003, and the cumulative data size is the batch transmission. If the data size is reached, the batch transmission final flag is set to the final meaning (BL = 1) according to a predetermined format, and the batch transmission data size is reached, if it is the last !, Set as meaning (BL = 0) and send Pass it to the frame generation circuit 2005. The control unit 2002 also notifies the serial number generation circuit 2004 to generate a serial number each time a frame is generated.

Upon receiving this, serial number generation circuit 2004 increases or decreases the serial number according to a predetermined rule, and passes it to transmission frame generation circuit 2005.

The transmission frame generation circuit 2005 arranges the batch transmission final flag, the serial number, and the data in a predetermined format, and transmits the data through the transmission unit 2006.

[0350] In FIG. 33, tl01, tl02, tl03, tl04, tl10 is a frame whose final transmission final flag is not final, and tl05, til is a final transmission final flag. Also, the serial numbers (SEQs) in each frame of tl01, tl02, tl03, tl04, and tl05 are described in the present embodiment as increasing by one, and as a specific item.

In the receiver 2101, when the opposite station also receives a frame via the reception unit 2108, the reception frame analysis circuit 2109 extracts each parameter in the reception frame. The parameters are, for example, a batch transmission final flag, a serial number, data, etc. The batch transmission final flag is passed to the batch transmission final flag analysis circuit 2110, and the serial number is passed to the serial number analysis circuit 2112. If necessary, they are stored in the memory 2103 via the control unit 2102.

At the same time, the error detection circuit 2111 performs error detection as to whether or not there is, for example, a CRC error in the received frame. If the error detection or error correction code is not a CRC code, error detection or error correction is performed accordingly.

In addition, the batch transmission final flag analysis circuit 2110 analyzes the batch transmission final flag, and notifies the analysis result.

[0354] In the sequence diagram of FIG. 33, when receiving frames of tl l3, tl l4, tl l5, tl21, the batch transmission final flag is the last. When receiving frames of tl l6, tl22, the batch transmission final flag is Each is notified to the control unit 2102 as the final.

[0355] Further, serial number analysis circuit 2112 analyzes whether serial numbers in the received frame are increased or decreased according to a predetermined rule, and notifies analysis result to control unit 2102. In the present embodiment, as the predetermined rule, the serial number is incremented by one for each frame. The sequence diagram of FIG. 33 shows the case where the frame of serial number 3 transmitted by the transmitter 2001 is not recognized by the receiver 2102 due to a channel abnormality, and the next frame of serial number 4 is received. . In this case, the frame of serial number 3 is notified to the control unit 2102 as a frame in which an error has occurred.

[0357] In control unit 2102, since the batch transmission final flag is notified that a frame meaning final is received, and serial number 3 is notified as a frame in which an error has occurred, errorless flag generation circuit 2104 is notified. On the other hand, the presence of an error is notified to serial number generation circuit 2105 and serial number 3 is notified, and transmission frame generation circuit 2106 is notified to generate a transmission frame.

[0358] Upon receiving this, the no-error flag generation circuit 2104 generates a flag indicating the presence of an error according to a predetermined format, and passes it to the transmission frame generation circuit 2106.

[0359] Further, the serial number generation circuit 2105 transfers the serial number 3 passed from the control unit 2102 to the transmission frame generation circuit 2106.

[0360] The transmission frame generation circuit 2106 to which these error free flags and serial numbers are passed arranges these parameters according to a predetermined format, and transmits the parameters via the transmission unit 2107. In the sequence diagram of FIG. 33, the frame of tl 17 is pointed.

The transmitter 2001 which has received the frame of tl 1 7 at tl 06 through the receiving unit 2008 performs extraction of each parameter in the reception frame in the reception frame analysis circuit 2009, and the extracted no error flag is The error-free flag analysis circuit 2010 is passed on, and the serial number is passed on to the serial number analysis circuit 2012.

No Error Flag Analysis Circuit 2010 analyzes the passed no error flag. In this case, since the frame of tl 17 transmitted by the receiver 2101 indicates that there is an error, it is analyzed as having an error, and the control unit 2002 is notified of that.

The serial number analysis circuit 2012 analyzes the serial number and notifies the control unit 2 002 of the analysis result. In this case, the serial number 3 is notified to the control unit 2002.

At the same time, the error detection circuit 2011 performs error detection as to whether or not there is, for example, a CRC error in the received frame. If the error detection or error correction code is not a CRC code, error detection or error correction is performed accordingly. [0365] Control section 2002 determines whether or not batch transmission can be normally performed by receiver 2101 based on the above analysis result of no error flag, serial number, and error detection result, and if there is an unsent portion in the transmission data For example, it is determined whether to transmit the data in a batch or to retransmit the data that has already been transmitted. In this case, it is determined that the receiver 2101 requests transmission from the frame with serial number 3 because there is an error, so that the transmission data is retransmitted from the part with serial number 3 at the previous transmission time. Do. Specifically, the batch transmission final flag circuit 2004 is notified that retransmission is to be performed, and the serial number generation circuit 2005 is notified of 3 as the start number.

Batch transmission final flag generation circuit 2004 recalculates the batch transmission data size, if necessary. The same value as the previous batch transmission data size may be used, or the batch transmission last flag may be the last with the serial number of the frame when transmitting the frame meaning the last batch transmission final flag as the final. Specifically, when a frame with a serial number of 1 to 5 is transmitted in the first batch transmission, and a frame retransmission request from the receiver power serial number 3 is received, the second batch transmission is performed. In the above, it is recommended that the batch transmission of serial numbers 3 to 7 be performed, and that the batch transmission of serial numbers 3 to 5 be performed.

[0367] In serial number generation circuit 2005, when notified of retransmission from serial number 3 from control unit 2002, the start number of the serial number is reset to 3 and is passed to transmission frame generation circuit 2006.

The transmission frame generation circuit 2006 generates a transmission frame, and transmits the transmission frame via the transmission unit 2007.

[0369] The state of these retransmissions is tl17, tl10, and ti1ll in FIG.

[0370] The receiver 2101 having received these retransmission frames determines that the error detection circuit 2111 and the pass number analysis circuit 2112 indicate that there is no error in all the received frames, the final transmission final flag indicates the end. After receiving the frame tl22, the control unit 2102 notifies the no-error flag generation circuit 2104 that there is no error.

In response to this, the no-error flag generation circuit 2104 sets the no-error flag as a meaning of no error, and passes it to the transmission frame generation circuit 2106.

Receiving this, the transmission frame generation circuit 2106 places an error-free flag in the frame, and transmits it via the transmission unit 2107. Explanation of serial number at this time is omitted Do.

When the transmitter 2001 having received the frame indicating that there is no error in this error free flag at tl 12 is that the error free flag analysis circuit 2010 determines that there is no error and notifies the control unit 2002 When the control unit 2002 recognizes that the batch transmission has succeeded and there is unsent data in the transmission data, it is possible to continue the batch transmission.

[0374] As described above, according to the transmitter 2001 and the receiver 2101, even if it is a communication method using a frame without limitation of window size, it is possible to perform retransmission processing when an error occurs, It becomes possible to perform reliable communication.

[0375] Also, in the transmitter 2001, when receiving a retransmission request from the receiver 2101 indicating that there is an error, from the receiver 2101, it is not possible to perform retransmission from the received serial number at the same time. May be resent.

[0376] When retransmission of transmission data is to be performed from the beginning, it is desirable that the assigned serial number be transmitted from an initial value according to a predetermined rule (for example, from 0 in this embodiment).

[0377] Also, when retransmission of transmission data is performed, if the number of retransmissions is limited and retransmission is performed more than a predetermined value, transmission can not be normally performed to the receiver 2101. It may be interrupted or terminated. In this way, when the quality of the communication path is extremely poor, it is possible to interrupt or terminate the communication and notify the user, and it is possible to perform communication on the communication path with improved quality.

Also, if the number of retransmissions is limited, for example, once, the counter can also process with flags that are not, which leads to simplification of the circuit.

[0378] Also, even in the case of retransmission from the serial number in the retransmission request from the receiver 2101, by limiting the number of retransmissions, transmission may be interrupted or terminated if the quality of the communication path is poor. The notification may improve the quality of the communication path.

[0379] As described above, when the number of times of retransmission is one, for example, processing with flags that are napped with a counter becomes possible, which leads to simplification of the circuit.

[0380] Further, the transmitter 2001 may set the batch transmission data size to one frame length, and the batch transmission final flag may be final in all the frames. In this case, all In the communication system, the response from the receiver 2101 is required, and the communication efficiency decreases. However, the transmitter 2001 should reduce the storage area of data to be held in response to the retransmission request from the receiver 2101. This is effective in the transmitter 2001 where the memory can not be sufficiently secured.

Further, in the receiver 2101, when the error detection circuit 2111 and the serial number detection circuit 211 2 detect that there is an error in the received frame, the control unit 2102 causes the batch transmission final flag analysis circuit 2110 to batch Since the data until the transmission final flag receives the final frame and requests the transmitter 2001 to retransmit is the data to be retransmitted by the transmitter 2001, processing for storing the data in the meantime in the memory 2103 is You may not do this. By doing this, it is possible to reduce power consumption for storing data that is scheduled to be re-received by retransmission.

Also, in the receiver 2101, a restriction is placed on the number of retransmission requests to be made when an error is detected in the received frame from the transmitter 2001, and more retransmission requests than a predetermined value are made. However, if the receiver 2101 can not perform batch reception normally, reception may be interrupted or terminated. In this way, when the quality of the communication path is extremely poor, it is possible to interrupt or terminate the communication and notify the user, and it is possible to perform communication on the communication path with improved quality.

Also, if the number of retransmission requests is limited, for example, to one, processing with flags that are not available on the counter is also possible, leading to simplification of the circuit.

Also, in the retransmission request to be made when an error is detected in the received frame from transmitter 2001 in receiver 2101, an initial value predetermined in serial number generation circuit 2105 (for example, in the present embodiment) The retransmission request frame may be transmitted to the transmitter 2001 by setting 0) at all times. By doing this, it is necessary to hold the serial number for the retransmission request when an error is detected, which leads to simplification of the circuit.

[Fifth Embodiment of the Implementation]

The transfer data transfer system (communication system) according to the fifth embodiment of the present invention is described below with reference to FIG. 32, and FIG. 34 to FIG. The terms (including members and functions) defined in the other embodiments are to be regarded as true unless otherwise stated. Also in the embodiment, it shall be used according to the definition.

This embodiment will be described with reference to FIG. 34 as a block diagram of a transmitter, FIG. 32 as a block diagram of a receiver, and FIGS. 35 and 36 as signal sequence diagrams.

FIG. 34 is a block diagram of a transmitter 2201 according to the present embodiment. FIG. 34 shows an example of the configuration of the transmitter, and the present invention is not limited to this. Further, each component circuit may be software or hardware. The following explains each component.

[0388] Transmitter (Primary station, client device) 2201 is a device that transmits transmission data. The transmission data mentioned here may be, for example, text data, image data and the like. Further, each component other than timer (clocking means) 2213 has the same function as each component of transmitter 2001 (FIG. 31) in the fourth embodiment described above, and therefore the description thereof is omitted.

The timer 2213 is controlled by the control unit 2002. Specifically, after transmission is performed with the batch transmission final flag as the final, the control unit 2002 is started, and when a response frame is not normally received from the receiver 2101 within a predetermined time, the control unit 2002 Informing time out.

Having received this timeout notification, the control unit 2002 can not normally receive, at the receiver 2101, a frame whose last flag is the last in the batch transmission final flag transmitted immediately before due to an abnormality in the communication path (FIG. 35). (a frame of t205) or a frame whose last indication sent by the last transmission final flag transmitted immediately before is successfully received by the receiver, but a frame including the error-free flag to which the receiver power is also transmitted is communicated Due to the abnormality of the path, it is judged that the transmitter can not normally receive (frame of t312 in FIG. 36), and the batch transmission final flag generation circuit 2004, the serial number generation circuit 2005, and the transmission frame generation circuit 2006 are notified.

The batch transmission final flag generation circuit 2004 that has received the notification sets the batch transmission final flag as the final, and passes it to the transmission frame generation circuit 2006.

Also, the serial number generation circuit 2005 that has received the notification re-sets the serial number of the immediately preceding frame and passes it to the transmission frame generation circuit 2006.

[0393] Upon receiving these, the transmission frame generation circuit 2006 receives the same frame as the frame transmitted immediately before. The data is set again, and the batch transmission final flag and the serial number are set and transmitted via the transmission unit 2007.

As described above, by the transmitter 2201 being configured, it is possible to retransmit a frame whose batch transmission final flag means the final, and even if the quality of the communication path is poor, the retransmission processing may be performed. It becomes possible to perform reliable communication.

[0395] Also, when the batch transmission final flag retransmits the final frame, the number of retransmissions is limited, and even if the number of retransmissions is larger than a predetermined value, batch transmission is normally performed to the receiver 2101. If this can not be done, the transmission may be interrupted or terminated. In this way, when the quality of the communication path is extremely poor, it is possible to interrupt or terminate the communication and notify the user, and it is possible to perform communication on the communication path with improved quality.

Also, as shown in the sequence diagram of FIG. 36, although the reply frame t312 is transmitted to the frame of t311 for which the batch transmission final flag is the value indicating the final, the communication path is abnormal. When the reply frame t312 can not be received normally by the transmitter, the frame t313 may be received again with the batch transmission final flag indicating the final value.

In such a case, in the receiver 2101, the control unit 2102 holds the immediately preceding serial number, and the batch transmission final flag analysis circuit 2110 allows the batch transmission final flag to be the final frame. When the received notification is received, if the serial number from the serial number analysis circuit 2112 is the same as the previous serial number, even if the analysis result of the serial number analysis circuit 2112 is an error, no processing is performed as an error. The control unit 2102 sets the same value as the frame transmitted immediately before in the no-error flag generation circuit 2104, and also sets the serial number of the frame transmitted immediately before in the serial number generation circuit 2105 and transmits it. If the value set in the no error flag generation circuit 2104 indicates no error, the serial number may not be set.

[0398] In this way, even when the transmitter can not normally receive the frame transmitted by the receiver whose channel quality is poor, it is possible to retransmit the frame of the receiver power, and the reliability is high. It is possible to communicate.

[0399] Further, in the receiver 2101, the batch transmission final flag indicates the final as described above, and the same When a plurality of frames having the same serial number is received, in the second and subsequent frames, since the in-frame data is already stored in the memory, the control unit 2102 does not store it again. You may control. By doing this, it is possible to reduce the power consumption for data storage.

Sixth Embodiment of the Embodiment

The transfer data transfer system (communication system) according to the sixth embodiment of the present invention is described below with reference to FIGS. 37 to 39. The terms (including members and functions) defined in the other embodiments are also used in this embodiment according to the definitions, unless otherwise specified.

This embodiment will be described with reference to FIG. 37 as a block diagram of a transmitter, FIG. 38 as a block diagram of a receiver, and FIG. 39 as a signal sequence diagram.

[0402] FIG. 37 is a block diagram of a transmitter 2301 according to the present embodiment. Note that FIG. 37 is an example of the configuration of the transmitter, and the present invention is not limited to this. In addition, each component circuit may be software or hardware. The following explains each component.

Transmitter (Primary Station, Client Device) 2301 is a device that transmits transmission data. The transmission data mentioned here may be, for example, text data, image data and the like. Also, each component other than the opposite station buffer size analysis circuit (opposite station buffer size analysis means) 2313 has the same function as each component of the transmitter 200 1 (FIG. 31) in the fourth embodiment described above. Description is omitted because it has.

[0404] The opposing station buffer size analysis circuit 2313 analyzes buffer size parameters included in the received frame of the receiver 2401 (Fig. 38), and notifies the control unit 2002 of the analysis result.

In response to this, the control unit 2002 sets the batch transmission data size to a value smaller than the buffer size of the receiver 2401 to the batch transmission final flag generation circuit 2004, and performs batch transmission. The receiver's buffer size should be received before batch transmission.

[0406] FIG. 38 is a block diagram of a receiver 2401 according to the present embodiment. Note that FIG. 38 is an example of the configuration of the receiver, and the present invention is not limited to this. Also, each component circuit is software It may be hardware or hardware. The following explains each component.

[0407] Receiver (Secondary station, server device) 2401 is a device that receives transmission data from the other device. Examples of transmission data as used herein include, but are not limited to, text data and image data. In addition, each component other than the buffer size generation circuit (buffer size generation means) 2413 has the same function as each component of the receiver 2101 (FIG. 32) in the fourth embodiment described above, I omit it.

The control unit 2102 passes the size of the buffer that can be received by the receiver 2401 to the buffer size generation circuit 2413.

The buffer size generation circuit 2413 generates the buffer size passed from the control unit 2102 according to a predetermined format, and passes it to the transmission frame generation circuit 2106.

The transmission frame generation circuit 2106 arranges the buffer size in the transmission frame and performs transmission. It is to be noted that the frame including the buffer size is preferably transmitted before the transmitter performs batch transmission, for example, the buffer size is arranged and transmitted in a frame transmitted at the time of connection. Is desirable but not limited to.

Next, the flow of each signal in the present embodiment will be described with reference to the sequence diagram of FIG.

At the time of connection, for example, the control unit 2102 of the receiver 2401 notifies the buffer size generation circuit 2413 of the buffer size that can be received by the receiver 2101 in brief.

[0413] Upon receiving this, buffer size generation circuit 2413 generates a knob size parameter according to a predetermined format, and passes it to transmission frame generation circuit 2106.

Upon receiving this, the transmission frame generation circuit 2106 arranges the buffer size parameter in the transmission frame according to a predetermined format, and transmits it. This is t in Figure 39.

There are 408 frames.

When a frame including the buffer size parameter of the receiver 2401 is received by the transmitter 2301, the reception frame analysis circuit 2009 extracts the knocker size parameter, and the opposite station buffer size analysis circuit 2313 Passed to

The opposing station buffer size analysis circuit 2313 analyzes the buffer size parameter and notifies the control unit 2002 of the analysis result. The control unit 2002 sets a size equal to or less than the analyzed buffer size as the batch transmission data size, and passes the size to the batch transmission final flag generation circuit 2004.

The batch transmission final flag generation circuit 2004 sets the batch transmission final flag based on the batch transmission data size passed from the control unit 2002, and performs batch transmission.

[0419] By doing as described above, it becomes possible for the receiver 2401 to notify the transmitter 2301 of the buffer size that can be received in a batch, and the transmitter 2301 can simultaneously receive all the receivable buffers from the receiver 2401. By recalculating the batch transmission data size based on the size and reflecting it in the control of the batch transmission final flag, it is possible for the transmitter 2301 to perform batch transmission exceeding the batch receivable buffer size of the receiver 2401. It is possible to prevent.

In addition, a default value of the batch receivable buffer size is determined in advance between the transmitter 2301 and the receiver 2401, and if the batch receivable buffer size is not received by the transmitter 2301, By defining that the default value is adopted, if the default value of the batch receivable buffer size in the receiver 2401 is equal to or less than the batch receivable knocker size of the receiver 2401, batch receivable is possible. Even if the buffer size is not notified to the transmitter 2301, if the transmitter 2301 performs batch transmission using the default batch receivable buffer size, the size of the batch receivable buffer of the receiver is also exceeded. It is possible to prevent the transmitter from performing batch transmission in advance. Also, in this case, it is not necessary for the receiver 2401 to transmit a frame for notifying the transmitter 2301 of the batch transmittable buffer size, which leads to bandwidth efficiency.

[Seventh Embodiment of the Implementation]

The transfer data transfer system (communication system) according to the seventh embodiment of the present invention is described below with reference to FIG. 40 to FIG. The terms (including members and functions) defined in the other embodiments are also used in this embodiment according to the definitions, unless otherwise specified.

This embodiment will be described with reference to FIG. 40 as a block diagram of a transmitter, FIG. 41 as a block diagram of a receiver, and FIG. 42 as a sequence diagram of signals.

[0423] FIG. 40 is a block diagram of a transmitter 2501 according to the present embodiment. Note that FIG. 40 is an example of the configuration of the transmitter, and the present invention is not limited to this. Also, each component circuit is software It may be hardware or hardware. The following explains each component.

Transmitter (primary station, client device) 2501 is a device that transmits transmission data. The transmission data mentioned here may be, for example, text data, image data and the like. In addition, since each component other than the data final flag generation circuit (data final flag generation means) 2513 has the same function as each component of the transmitter 2001 (FIG. 31) in the fourth embodiment described above, Is omitted.

Data final flag generation circuit 2513 determines whether or not the transmission frame includes the last of the transmission data, and if the final data is included, the data final flag is determined according to a predetermined format indicating its meaning. If the final data is not included, the data final flag is generated according to a predetermined format indicating its meaning, and is sent to the transmission frame generation circuit 2006.

When the control unit 2002 of the transmitter 2501 generates a transmission frame, the control unit 2002 of the data final flag generation circuit 2513 transmits the final data of transmission data in the transmission frame generated by the transmission frame generation circuit 2006. Inform if it is not.

Data final flag generation circuit 2513 receives this, generates a data final flag according to a predetermined format, and passes it to transmission frame generation circuit 2006. In the present embodiment, the abbreviation DL (Data Last) is defined. If DL is 0, the last data of transmission data is not included in the frame, and if DL is 1, transmission data is omitted. Means that the final data of is included. In the present embodiment, it may be another expression of force represented by the abbreviation DL. Also, when transmitting a frame including the final data of transmission data, the force of setting DL to 1 For example, when a certain type of response data is required as a response from the opposite station, this flag is a response request flag. If this flag has the same meaning as the response request flag and performs the same operation as the flag DL meaning the final data of the transmission data in the present embodiment, the flag It may be a request flag.

The transmission frame generation circuit 2006 arranges the data final flag, the batch transmission final flag, the pass number, and the data in the transmission frame, and transmits the data through the transmission unit 2007.

In the sequence diagram of FIG. 42, the frames at t501, t502, t503, and t504 are data. The final flag DL is 0, and the final data of transmission data is not included in the frame, and the frame of t505 has the data final flag DL of 1 and the final data of transmission data is included in the frame, Show me.

[0430] Next, FIG. 41 is a block diagram of a receiver 2601 according to the present embodiment. Note that Figure 41 is an example of the configuration of the receiver, and the present invention is not limited to this. In addition, each component circuit may be software or hardware. The following explains each component.

Receiver (Secondary Station, Server Device) 2601 is a device that receives transmission data from the other device. Examples of transmission data as used herein include, but are not limited to, text data and image data. Also, each component other than the data final flag analysis circuit (data final flag analysis means) 2613 has the same function as each component of the receiver 2 101 (FIG. 32) in the fourth embodiment described above, The description is omitted.

Data final flag analysis circuit 2613 analyzes the data final flag arranged in the received frame, and sends to control unit 2102 whether or not the received data includes the final data of the transmission data to be transmitted by the transmitter. And notify.

In the receiver 2601, the received frame analysis circuit 2109 extracts a data final flag from the reception frame received via the reception unit 2108, and passes the data final flag analysis circuit 2613 to the data final flag analysis circuit 2613. At the same time, the batch transmission final flag and serial number are also extracted and analyzed by each analysis circuit.

Data final flag analysis circuit 2613 analyzes whether or not the final data of the transmission data of transmitter 2501 is included in the reception frame, and the result is notified to control section 2102.

[0435] In the control unit 2102, when the final data of the transmission data of the transmitter 2501 is included, a predetermined process (for example, the case where the reception data is compressed and it is ^ JPEG (Joint Photographic Exteriors Group) data It is possible to perform processing such as starting JPEG decoding, etc.).

Also, in the frame including the final data of the transmission data, when the batch transmission final flag indicates the end, it is possible to set the no error flag to an appropriate value and perform transmission. Also, at this time, if it is necessary to return response data to the transmission data from the transmitter 2501, an error-free flag is also arranged and transmitted when the data is arranged in the transmission frame. By doing this, it is possible to improve the efficiency of the band. This is the frame of t512 in FIG.

The transmitter 2501 having received this frame t512 at t506 can receive the response data from the receiver 2601 by analyzing the data in the received frame.

[Eighth Embodiment of the Implementation]

The transfer data transfer system (communication system) according to the eighth embodiment of the present invention is described below with reference to FIG. The terms (including members and functions) defined in the other embodiments are also used in the present embodiment according to the definition unless otherwise specified. The sequence according to the present embodiment includes the transmitter 2001 (FIG. 31), the receiver 2101 (FIG. 32), the transmitter 2201 (FIG. 34), the receiver 2301 (FIG. 37), and the receiver 2401 (FIG. 38), transmitter 2501 (Fig. 40) and receiver 2601 (Fig. 41) are additional functions that can be implemented.

FIG. 43 is a sequence diagram according to the present embodiment.

In the present embodiment, the IrDA (Infrared Data Association) IrLAP (Infrared Link Access Protocol) UI (Unnumbered) is used as a universal f-force equation that does not limit the window size between the transmitter and the receiver. Communication is performed using the Information) frame. In addition, transmitters and receivers support Object Exchange Protocol (OBEX), and data shall be transmitted by the Put operation.

[0442] In Fig. 43, transmission data is arranged in the Put Final command of OBEX, and frame transmission is performed using the UI frame of IrLAP.

[0443] The Put Final command is composed of dataO to data7, and dataO force and so on are all divided into data so that they become Put Final commands.

[0444] Also, the batch transmission data size of the transmitter is a size obtained by concatenating data3 from dataO, and when the serial number becomes 3, a frame t604 with the batch transmission final flag BL set to 1 is transmitted. At this time, the final data of transmission data configured with the OBEX Put Final command The data final flag DL is 0 because the data7 which is a data is not included in the transmission frame.

[0445] The receiver that received the frame of the batch transmission final flag BL power ^ at t 614 does not detect an error in the frame received so far, so the no error flag indicates no error, and at t 615 To send. In addition, since the data final flag of the received frame is 0, at this point, the SUCCE SS response, which means normal reception for the Put Final command of OBEX, is not included in the transmission frame.

[0446] At t605, the transmitter that receives the frame indicating that the error-free flag indicates no error determines that the receiver has successfully received batch transmission of serial numbers 0 to 3, and subsequently transmits data4 as well as data7 collectively. . When frame transmission of serial number 7 is performed at t609, the batch transmission final flag is set to 1. Further, at t609, since the frame of serial number 7 includes data7 which is the final data of the transmission data, the data final flag DL is set to 1.

[0447] At t619, the receiver that received the frame with the data final flag 1 has received frames with serial numbers 4 to 7 correctly, and can correctly receive all Put Final commands from the transmitter. Therefore, a SUCCESS response is generated, which means normal reception for the Put Final command. In addition, since the batch transmission final flag is 1, according to the SUCCESS response, the no-error flag is regarded as having no error, and is sent together at t620.

The transmitter having received the frame indicating that the error free flag indicates no error at t610 recognizes that the batch transmission up to the serial number 4 and the serial number 7 has ended normally, and the inside of the received frame is received. Since the SUCCES response to the Put Final command sent by the transmitter is included, it is possible to recognize that the Put operation has also completed successfully.

As described above, according to the communication method of the present embodiment, there is no limitation on the window size! Even when the Ir LAP UI frame is used, confirmation of communication between the transmitter and the receiver And exchange of data can be performed reliably.

[Ninth embodiment of the invention]

The transfer data transfer system (communication system) according to the ninth embodiment of the present invention is shown in FIG. It is as follows when it demonstrates based on 44 to FIG. The terms (including members and functions) defined in the other embodiments are also used in this embodiment according to the definitions, unless otherwise specified.

This embodiment will be described with reference to FIG. 44 as a block diagram of a transmitter, FIG. 45 as a block diagram of a receiver, and FIG. 46 as a signal sequence diagram.

[0452] FIG. 44 is a block diagram of a transmitter 2701 according to the present embodiment. FIG. 44 shows an example of the transmitter configuration, and the present invention is not limited to this. Further, each component circuit may be software or hardware. The following explains each component.

The transmitter 2701 is a device that transmits transmission data. Here, the transmission data may be, for example, text data, image data and the like.

As shown in FIG. 44, a transmitter (primary station, client device) 2701 includes a control unit (control means) 2702, a memory (storage means) 2703, a serial number generation circuit (serial number generation means) 2705, a transmission frame A generation circuit (transmission frame generation means) 2706, a transmission unit (transmission means) 2707, and a data final flag generation circuit (data final flag generation means) 2713 are provided.

The control unit 2702 controls each component of the transmitter 2701.

[0456] The memory 2703 stores transmission data. This memory 2703 may be volatile memory (for example, SDRAM or the like) or non-volatile memory (for example, flash memory, HDD, DVD or the like). Also, in FIG. 44, the memory 2703 is disposed in the transmitter 2701, but it is necessary to be connected to the transmitter 2701 as an external memory of the transmitter 2701 which is not necessarily present in the transmitter 2701. OK.

[0457] The serial number generation circuit 2705 is a circuit that increases or decreases the serial number according to a predetermined rule, and assigns it to each transmission frame. In this embodiment, the abbreviation SEQ (Sequence number) is defined, and when SEQ is 1, it is indicated that the serial number is 1. Also in the sequence diagram of FIG. 46, the abbreviation of SEQ is used in the same meaning.

[0458] Data final flag generation circuit 2713 determines whether or not the transmission frame includes the last of the transmission data, and if the final data is included, a predetermined frame indicating the meaning thereof. The data final flag is generated by the format, and if the final data is not included, the data final flag is generated according to a predetermined format indicating its meaning, and is sent to the transmission frame generation circuit 2706. In the present embodiment, the abbreviation DL (Data Last) is defined, and in the case where DL is 0, the last data of transmission data is not included in the frame, and in the case where DL is 1, transmission data It means that the final data is included. In the present embodiment, it may be a force-based expression represented by the abbreviation DL. Also, if an agreement has been made in advance between the transmitter 2701 and the receiver 2801, this data final flag needs to have a value indicating the final only in the transmission frame that necessarily includes the final data of the transmission data. According to a predetermined rule, for example, when transmitting specific data that is not the final data of the transmission data, the final data flag may be set to a value indicating the final. In that case, it may be different from the data final flag. In this embodiment, DL and abbreviations are used as the data final flags.

The transmission frame generation circuit 2706 is a circuit that generates a transmission frame according to a predetermined format. The above-mentioned data final flag DL, serial number SEQ, and transmission data are arranged according to a predetermined format to generate a transmission frame. Note that, in the present invention, since a communication method with no restriction on the window size is used, a transmission frame in a frame format having no restriction on the window size is generated. In this embodiment, a UI (Unnumbered Information) frame in IrLAP (Infrared Link Access Protocol) is used. In addition, an error detection code is also added to allow the opposite station to detect an error. The error detection code includes, for example, CRC (Cyclic Redundancy Check), but is not limited thereto. Also, an error correction code may be added.

The transmitting unit 2707 is a circuit that transmits the transmission frame generated by the transmission frame generation circuit 2706. For example, if infrared light is used as the communication medium, it may be an LED (light emitting diode) or an LD (laser diode), but it is not limited thereto. When another communication medium is used, the transmission unit corresponds to the communication medium.

FIG. 45 is a block diagram of a receiver 2801 according to the present embodiment. FIG. 45 shows an example of the configuration of the receiver, and the present invention is not limited to this. Also, each component circuit is software It may be hardware or hardware. The following explains each component.

The receiver 2801 is a device that receives transmission data from the other device. The transmission data mentioned here is not limited to this, for example, text data, image data and the like.

As shown in FIG. 45, a receiver (secondary station, server device) 2801 includes a control unit (control unit) 28 02, a memory (storage unit) 2803, a receiving unit (reception unit) 2808, and a reception frame analysis. Circuit (reception frame analysis means) 2809, error detection circuit (error detection means) 2811, serial number analysis circuit (serial number analysis means) 2812, data final flag analysis circuit (data final flag analysis means) 2813 .

The control unit 2802 controls each component of the receiver 2801.

The memory 2803 stores received data. This memory 2803 may be volatile memory (for example, SDRAM or the like) or non-volatile memory (for example, flash memory, HDD, DVD or the like). In FIG. 45, the memory 2803 is disposed in the receiver 2801 but may be connected to the receiver 2801 as an external memory of the receiver 2801 which is not necessarily present in the receiver 2801. .

[0466] The receiving unit 2808 is a circuit that receives a frame transmitted by the opposite station. For example, if infrared light is used as a communication medium, it becomes PD (photodiode), but it is not limited to this. When another communication medium is used, the reception unit corresponds to the communication medium.

A received frame analysis circuit 2809 analyzes the received frame received by the receiving unit 2808. Specifically, the data final flag in the received frame is extracted and passed to the data final flag analysis circuit 2813. Also, it extracts the serial number in the received frame and passes it to the serial number analysis circuit 2812. If data is present in the received frame, the data is extracted and stored in the memory 2803 via the control unit 2802. When storing data in the memory 2803, it does not have to be via the control unit 2802.

The error detection circuit 2811 interprets the error detection code attached to the received frame, determines whether or not there is an error in the received frame, and notifies the control unit 2802 of the analysis result. Examples of codes for error detection include, but not limited to, cyclic codes such as cyclic redundancy check (CRC) codes. Also, an error correction code is given. If this is the case, error correction will be performed.

The serial number analysis circuit 2812 analyzes whether or not the serial numbers assigned in the received frame increase or decrease according to a predetermined rule, and notifies the control unit 2802 of the analysis result. For example, when a frame is missed in the communication path, the serial number analysis circuit 2812 determines that an error occurs.

The data final flag analysis circuit 2813 analyzes the data final flag passed by the reception frame analysis circuit 2809 and notifies the control unit 2802 of the analysis result.

Next, the flow of each signal in the present embodiment will be described with reference to the sequence diagrams of FIG. 44, FIG. 45, and FIG. The transmitter 2701 and the receiver 2801

It supports Object Exchange Protocol (OBEX) and sends data by Put operation.

In FIG. 46, transmission data is arranged in the Put Final command of OBEX, and frame transmission is performed using the UI frame of IrLAP.

[0473] The Put Final command is composed of dataO to data7. When all data7 and data7 are concatenated, it is divided so that it becomes a Put Final command. Also, it is the final data of data7 Force Put Final command.

[0474] In the transmitter 2701, when a transfer request for transmission data occurs from within the own device or from outside.

The control unit 2702 notifies the serial number generation circuit 2705 of the generation of the serial number. Also

The data final flag generation circuit 2713 is notified of the generation of the data final flag.

[0475] The serial number generation circuit 2705 increases or decreases the serial number according to a predetermined rule, and passes it to the transmission frame generation circuit 2006.

Further, data final flag generation circuit 2713 determines whether or not the transmission data includes the final data of the transmission data, and indicates the final if it is included, and indicates the not final if it is not included. A data final flag in a predetermined format is created and passed to a transmission frame generation circuit 2706.

[0477] The transmission frame generation circuit 2706 arranges the data final flag, serial number, and data in a predetermined format, and transmits the data via the transmission unit 2706.

[0478] In Fig. 46! / ヽ t, t701, t702, t703, t704, t705, t706, t707 force ^ Data final data The frame whose lag is not final, t 708 is the final frame whose data final flag is final. In the present embodiment, the serial number (SEQ) in each frame of t70 1 force t 708 is described as a spider by being incremented by one.

[0479] Next, in the receiver 2801, when the opposing station also receives the frame via the receiving unit 2808, the reception frame analysis circuit 2809 extracts each parameter in the reception frame. The parameters are, for example, data final flag, serial number, data, etc. The data final flag is passed to the data final flag analysis circuit 2813, and the serial number is passed to the serial number analysis circuit 2812, and the data is For example, it is stored in the memory 2803 via the control unit 2802. At the same time, the error detection circuit 2811 performs error detection as to whether or not there is, for example, a CRC error in the received frame. If the error detection or error correction code is not a CRC code, error detection or error correction is performed accordingly.

[0480] Further, the data final flag analysis circuit 2813 analyzes the data final flag and notifies the analysis result. In the sequence diagram in Fig. 46, when the frame of t701, t702, t703, t704, t705, t706, t707 is received, the data final flag is not the last. When the frame of t708 is received, the data final flag is not received. Is notified to the control unit 2802 as the final.

Further, serial number analysis circuit 2812 analyzes whether serial numbers in the received frame are increased or decreased according to a predetermined rule, and notifies control unit 2802 of the analysis result. In the present embodiment, as the predetermined rule, the serial number is incremented by one for each frame. In the sequence diagram of FIG. 46, all eight frames transmitted by the transmitter 2701 are normally received, and it is determined that the transmission number is incremented by one with the transmitter 2701 in advance. Since the serial number of the frame is increased by one compared to the serial number of the previous frame, the control unit 2802 of the receiver 2801 is notified as a normal reception in all the received frames.

If no error is detected in all received frames, and a frame including a data final flag is received, control unit 2802 performs a predetermined process (for example, received data is compressed ^ JPEG data In this case, it is possible to perform processing such as starting JPEG decoding etc.). Further, in the receiver 2801, when the error detection circuit 2811 and the serial number detection circuit 2812 detect that there is an error in the received frame, it is assumed that the process of storing the subsequent data in the memory 2 103 is not performed. It is also good. By doing this, it is possible to reduce power consumption, which helps save data after an error is detected.

[0484] As described above, according to the transmitter 2701 and the receiver 2801, in the communication method using the UI frame of IrLAP without limitation of window size, detection of frame omission also in one-way communication It is possible to perform reliable communication. In one-way communication, the transmitter 2701 can not receive a SUCCESS response to the Put Final command of OBEX. However, in the control unit 2702 of the transmitter 2701, in one-way communication, transmission of the Put Final is completed. Then, if it is determined to end the Put operation, data transfer by the Put operation can be performed normally even in one-way communication.

Tenth Embodiment of the Invention

The transfer data transfer system (communication system) according to the tenth embodiment of the present invention is described below with reference to FIGS. The terms (including members and functions) defined in the other embodiments are also used in this embodiment according to the definitions, unless otherwise specified.

In this embodiment, a method of determining the size of data to be transmitted collectively will be described. In the communication system of the present invention, the size of batch transmission data transmitted collectively by the transmitter can be determined for convenience of data retransmission and data processing in the receiver. Note that the size of the batch transmission data may be determined by the application of the transmitter or the like according to the type of data to be transmitted, the state of the communication path, etc. The size of the batch transmission data from the receiver You may send information to the transmitter to determine the size (for example, receiver sniff size).

Also, data division is usually performed by the SMP layer, but may be performed by other layers.

In the present embodiment, the case of transferring a JPEG image will be described as an example.

[0488] FIG. 47 is a block diagram showing a configuration of a JPEG encoder in a transmitter and a JPEG decoder in a receiver. [0489] As shown in FIG. 47, when transferring a JPEG image, DCT conversion is first performed on the original image in units of blocks (mcu: minimum coded unit) in the JPEG encoder 91 of the transmitter. mcu is the minimum unit for JPEG conversion, and there are four types of 8x8, 8x16, 16x8, and 1616 depending on the compression method (Fig. 48 (&) to (1)).

In 8 × 8 (FIG. 48A), the luminance component (Y) and the chromaticity components (Cb, Cr) have a one-to-one relationship in all pixels. In 8 x 16 (Fig. 48 (b)), in one vertical unit (1), Y is 2 (corresponding to 1 and 9 in 8 x 8), Cb (average of 1 and 9 in 8 x 8), Cr There is one each (average of 1 and 9 in 8x8). In 16 x 8 (Fig. 48 (c)), two Y (corresponding to 1 and 2 in 8 x 8), Cb (average of 1 and 2 in 8 x 8), Cr (8 x 8) in one horizontally long unit 1) and the average of 2 in 8)! In 16 x 16 (Fig. 48 (d)), in one unit (1) Y force (equivalent to 1, 2, 9, 10 in 8 X 8) and Cb (1, 2, 9, 8 in 8 X 8) There are 16 averages) and 1 Cr (average of 1, 2, 9 and 16 in 8x8).

As described above, the 8 × 8 has the lowest compression ratio, and the decoded image is closer to the original image, but the amount of data is larger. This is generally called 4: 4; 4. In addition, although the amount of data with the highest compression ratio in the 16 × 16 block is small, the number of averaged parts is large, so the possibility of obtaining a decoded image different from the original image is high.

Then, in the DCT transform, DCT transform (discrete cosine transform) is performed based on the input in block units described above. This transformation is calculated as a multiplication of a two-dimensional matrix to obtain 64 transformation coefficients, the number of which is the same as the number of pixels in the block. The closer to the upper left, the lower the frequency component, and the closer to the lower right, the higher the frequency component. Generally, in an image, the correlation with adjacent pixels is large, so the higher the conversion coefficient of the frequency component, the lower the appearance probability.

Next, in the quantization, the above-mentioned transform coefficient is divided by a predetermined quantization table. As described above, since the appearance probability of high frequency transform coefficients is generally low, if the high frequency portion of the conversion table is enlarged, most of the high transform coefficients of frequency components become 0 by performing quantization.

[0494] Finally, in the entropy code 符号, a predetermined entropy code 匕 The entropy code is performed based on the bull. As described above, the transform coefficient converted to 0 by quantization is expressed as a continuous number of 0 by the entropy code 、, and compression is possible at this point. That is, in the original image, an image with a low frequency component (a change in adjacent color is severe) tends to have a high compression efficiency of JPEG compression.

[0495] Then, the entropy coded image data is transmitted to the communication channel.

On the other hand, in the receiver that has received the above-described entropy-coded image data from the communication channel, the operation performed by the JPEG decoder 92 is completely reverse to the operation performed by the transmitter. , JPEG decoding.

[0497] First, in entropy decoding 匕, entropy decoding is performed based on a predetermined entropy code 04 table. Then, the data obtained by performing the entropy decoding is dequantized by dequantization using a predetermined dequantization table. The data after inverse quantization is converted to luminance component Y and chromaticity components Cb and Cr by inverse DCT transformation. Also, at this time, the image is restored using the luminance component Y and the averaged chromaticity components Cb and Cr according to the 8 × 8, 8 × 16, 16 × 8, and 16 × 16 compression methods, respectively.

As described above, in the transfer of JPEG images, data processing is performed in block units (mcu) in compressed image generation and decoding. Further, in the display after decoding, it may be convenient to perform the above-mentioned processing in units of one line in which the mcu are arranged in one column, or processing in units of one frame (one image unit). This means that in the video signal, there is a horizontal sync signal for each line, and a vertical sync signal for each frame, and by updating the line buffer and frame buffer for each of these sync signals, video This is because it is possible to process the memory update timing. This is also true for moving picture processing such as MPEG that performs processing in block units.

[0499] Next, as a specific example of the data division retransmission process, the case of division retransmission in mcu units, the case of division retransmission in lines, and the case of division retransmission in files will be described.

[0500] FIG. 49 is an explanatory diagram of division and retransmission processing in units of mcu in the communication system of the present invention.

[0501] At the transmitter, the above-mentioned DCT, quantization, and entropy coding are performed in mcu units. I am sending. Specifically, when the data is transferred to the temporary transmission buffer in units corresponding to mcul data, and the data of the temporary transmission buffer is transferred, the batch transmission end flag is set to 1.

[0502] Every time a frame is received with the batch transmission end flag set to 1, the receiver transfers data in the reception temporary buffer to, for example, the application, and the application performs JP EG decoding.

[0503] When dividing and transmitting in units of mcu in this way, the transmitter's temporary buffer for transmission and the receiver's temporary buffer for reception are only mcul (several tens of bytes to hundreds of bytes). You should secure it. Therefore, in a communication device where it is difficult to secure temporary memory, it is an effective split retransmission method.

[0505] The transmitter transfers one column's worth of data (corresponding to 8 lines in the case of 8 × 8) to the temporary buffer for transmission, and when transmission of one column's worth of transmission is complete, batch transmission The end flag is set to 1.

[0506] When the receiver receives a frame of batch transmission end flag force ^, for example, it transfers received data to the application and performs JPEG decoding in the application.

[0507] As described above, in the case of performing divisional retransmission in units of lines, when data is transferred to the application, data for one column (eight lines for 8 × 8) is prepared, and reception is performed. It is possible to simplify the processing in the case of processing data in units of columns. Also, in the display system that displays only the part where an error has not occurred when an error occurs, the display data is not cut off in the middle of the column because the data after decoding is in units of columns. In this case, it is expected that the transmission temporary buffer of the transmitter and the reception temporary buffer of the receiver will require several kilobytes to several hundred kilobytes.

FIG. 51 is an explanatory diagram of the division and retransmission processing in units of files in the communication system of the present invention.

[0509] The transmitter passes one transmission image to the transmission temporary buffer, and sets the batch transmission end flag to 1 when transmission of all the data in the transmission temporary buffer is completed.

On the receiving side, when the frame of batch transmission end flag force ^ is received, for example, the application The received data is passed to Caseion, and JPEG decoding processing is performed in the application.

As described above, when divisional retransmission is performed in file units, divisional retransmission processing can be performed in data units of one image, and thus the JPEG decoder of the application can perform JPEG decoding in units of one image. When the decoding of a single image is completed, processing such as updating a frame memory for display can be easily performed. In this case, it is expected that the transmission temporary buffer of the transmitter and the reception temporary buffer of the receiver will be about several hundred kB power MB. In addition, in processing systems that continuously transmit still images, such as MPEG, when an error occurs due to communication, processing such as continuing to display the previous image in a complete state is simplified. It is effective because it can be done.

[0512] With regard to the time to wait for a response from the receiver, it is desirable to retransmit immediately if an error occurs in the frame of the batch transmission end flag ^. However, there may be cases where a response can not be returned, as in the case where an error has not occurred and the processing of received data in the receiver is time-consuming. In this case, if the transmitter sets a time that is longer than the reception data processing time but not too large, and the response does not return after waiting for the above time, a frame with the batch transmission end flag set to 1 is selected. It may be resent. As a result, the data processing time in the receiver can be guaranteed, and optimal retransmission processing can be performed.

Eleventh Embodiment of the Implementation

The client device (communication device) of the transfer data transfer system (communication system) according to the eleventh embodiment of the present invention will be described below. The terms (including members and functions) defined in the other embodiments are also used in this embodiment according to the definition unless otherwise specified.

First, FIG. 52 is a block diagram of a client device that performs communication using the conventional OBEX protocol.

As shown in FIG. 52, the conventional client device (communication device) 3200 includes an application layer processing unit 3210, an OBEX layer processing unit (object exchange layer processing unit) 3220, and a lower layer processing unit 3230. At least a transmitting unit 3240 and a receiving unit 3250 are provided.

[0516] The application layer processing unit 3210 receives a user's instruction input to the operation unit (not shown). In response to this, it requests the OBEX layer processing unit 3220 to issue a request command.

The OBEX layer processing unit 3220 includes a control unit 3221, a request notification unit 3222, and a response reception unit 3223.

In response to a request from the application layer processing unit 3210, the control unit 3221 notifies the request notification unit 3222 to generate a request command and issue a request command to the lower layer. Also, upon receiving the notification of the reception result of the response command from the response receiving unit 3223, the application layer processing unit 3210 is notified of the reception result of the response command.

The request notification unit 3222 receives the request command issuance notification from the control unit 3221, generates a request command, and outputs the request command to the lower layer processing unit 3230. The response receiving unit 3223 receives the response command output from the lower layer processing unit 3230, analyzes the received response command, and notifies the control unit 3221 that the command analysis result and the response command have been received. Do.

The lower layer processing unit 3230 adds an appropriate lower layer header to the request command from the OBEX layer processing unit 3220 and passes it to the transmitting unit 3240 and, from the reception response command from the receiving unit 3250, an appropriate one. Remove the lower layer header and pass it to the OBEX layer processing unit 3220.

[0521] The transmitting unit 3240 transmits the request command received from the lower layer processing unit 3230 to the outside through the infrared communication path.

The receiving unit 3250 receives the response command transmitted from the other device (server device) via the infrared communication path, and outputs the received response command to the lower layer processing unit 3230.

Next, the operation of the control unit 3221 of the OBEX layer processing unit 3220 shown in FIG. 52 will be described using the flowchart shown in FIG.

Step S 51 is a step in which the application layer processing unit 3210 of the client device 3200 and the control unit 3221 of the OB layer processing unit 3220 determine whether or not a request command to the server device has been generated. If it is generated, the process proceeds to step S52, and if it is generated, the process proceeds to step S51 again.

Step S52 is a step of transmitting a request command to the server device to the lower layer processing unit 3230. After the end of transmission, the process proceeds to step S53.

Step S53 receives a response command from the Sano device from the lower layer processing unit 3230. It is a step to determine whether or not. If it has been received, the process goes to step S54, and if it has not been received, the process goes to step S53 again.

Step S 54 is a step of analyzing the received response command. After analysis, the process transitions to step S55.

[0528] Step S55 is a step of determining whether or not the communication end capability. If the communication has not ended, the process returns to step S51 again.

[0529] With the above operation, the OBEX layer processing unit 3220 of the conventional client device 3200 can issue a request command, analyze a response command to it, and perform communication by issuing the next request command again. It becomes possible.

However, in the operation of the OBEX layer processing unit 3220 of the conventional client device 3200 described above, there is a problem that the next request command can not be sent unless the server device power response command is received.

In order to solve this, as shown in the flowchart of FIG. 55, in the client device 3300 (FIG. 54) according to the present embodiment, after issuing a request command to the server device, the response command from the server device is issued. It is possible to issue the next request command without receiving. Specifically, it is as follows.

Step S 61 is a step of determining whether or not a request command to the server is generated in the application layer processing unit 3310 of the client apparatus 3300 and the control unit 3321 of the OB layer processing unit 3320. If it is generated, the process proceeds to step S62, or if it is generated, the process proceeds to step S61 again.

Step S62 is a step of transmitting a request command for the server device to the lower layer processing unit 3330. After the end of transmission, the process proceeds to step S65.

[0534] Step S65 is a step of determining whether or not the communication termination capability. If the communication has not ended, the process returns to step S61 again.

[0535] The control unit 3321 of the OBEX layer processing unit 3320 of the client device 3300 performs the above-described operation to send the request command from the client device 3300 and then receive no response command from the server device. , The next request command can be sent.

Here, FIG. 54 is a block diagram of the client device 3300 according to the present embodiment. The blocks other than the communication direction selection unit 3324 of the OBEX layer processing unit (object exchange layer processing unit) 3320 are the blocks of the OBEX layer processing unit 3220 of the conventional client device 3200 described above with reference to FIG. 52. Description is omitted because it has the same function.

The communication direction selection unit 3324 has a function of selecting whether the communication is one-way communication or two-way communication. Here, one-way communication is communication that requires a response command from the server device in response to a request command from the client device. When the transmitting unit does not exist in the server device, or when the receiving unit does not exist in the client device, although the communication is necessarily one-way communication, the transmitting device and the receiving device are respectively provided by the client device and the Sano device. However, if the signal flow is one-way to the client device server device, it will still be one-way communication. Also, two-way communication is a communication method in which a server device transmits a response command in response to a request command to which client device power is also transmitted, and after analysis of the response command, the client device transmits the next request command again. is there. In this case, for all request commands, response commands are not required, and arrangements have been made in advance in both the client device's OBEX layer and the Sano device's OBEX layer, if specific. The response command to the request command is not necessary!,.

Next, the operation of the control unit 3321 of the OBEX layer processing unit 3320 of the client device 3300 according to the present embodiment will be described using the flowchart of FIG.

Step S70 is a step in which the communication direction selection unit 3324 selects bidirectional communication or unidirectional communication. In the case of two-way communication, the process transitions to step S71, and in the case of one-way communication, the process transitions to step S81.

Step S 71 is a step of determining whether or not a request command to the server device has been generated in the application layer processing unit 3310 or the control unit 3321 of the OB EX layer processing unit 3320 in two-way communication. If it is generated, the process proceeds to step S72, and if it is generated, the process transitions to step S71 again.

Step S 72 is a step of transmitting a request command for the server device to the lower layer processing unit 3330 in two-way communication. After the end of transmission, the process proceeds to step S73.

Step S73 is a step of determining whether or not the server device power response command has been received in the two-way communication. If received, go to step S74. If not, the process transitions to step S73 again.

[0544] Step S74 is a step of analyzing the server device power response command in the two-way communication. After analysis, the process moves to step S75.

[0545] Step S75 is a step of determining whether or not to end communication in two-way communication. If not, the process returns to step S71.

On the other hand, in step S 81, whether or not a request command to the server device is generated in the control unit 3321 of the application layer processing unit 3310 or the OBEX layer processing unit 3320 in one-way communication. Is a step of determining If it has occurred, the process proceeds to step S82. If not, the process proceeds to step S81 again.

Step S 82 is a step of transmitting a request command for the server device to the lower layer processing unit 3330 in one-way communication. After the end of transmission, the process proceeds to step S85.

Step S85 is a step of determining whether or not to end communication in one-way communication. If not, the process returns to step S81.

[0549] The control unit 3321 of the OBEX layer processing unit 3320 of the client device 3300 performs the above-described operation to send a next request command after waiting for a response command from the server device in two-way communication. In one-way communication, it is possible to send the next request command without receiving the server device's response command.

Twelfth Embodiment of the Implementation

The client device (communication device) of the transfer data transfer system (communication system) according to the twelfth embodiment of the present invention will be described below. The terms (including members and functions) defined in the other embodiments are also used in this embodiment according to the definition unless otherwise specified.

[0551] FIG. 54 is a block diagram of the client device 3300 according to the present embodiment. That is, the operation of each block other than the control unit 3321 of the OBEX layer processing unit 3320 is basically the same as the operation of each block in the eleventh embodiment. The explanation is omitted.

The operation of the control unit 3321 of the OBEX layer processing unit 3320 according to the present embodiment will be described using the flowchart shown in FIG. Step S 91 is a step of determining whether or not a Put request command to the server device is generated in the control unit 3321 of the application layer processing unit 3310 or the OBEX layer processing unit 3320. If it has occurred, the process proceeds to step S92. If not, the process proceeds to step S91 again.

Step S92 is a step of transmitting a Put request command to the Sano device. After the end of transmission, the process proceeds to step S93.

[0555] Step S93 is a step of determining whether the sent Put request command is not the final Put request command. If it is final, the process goes to step S94, and if it is not final, the process goes to step S91.

Step S 94 is a step of determining whether or not the response command from the Sano device has been received. If it has been received, the process goes to step S95, and if it has not been received, the process goes to step S94 again.

Step S95 is a step of analyzing a response command from the Sano device. After analysis, the process moves to step S96. At this time, it is determined whether or not the SUCC ESS response command to the final Put request command has been received.

[0558] Step S96 is a step of determining whether the communication has ended. If not ended, the process returns to step S91 again.

[0559] The control unit 3321 of the OBEX layer processing unit 3320 of the client device 3300 performs the above-described operation to respond to a non-final Put request command without waiting for the server device's CONTI NUE response command. It becomes possible to send a Put request command, and it becomes possible to improve the efficiency of communication. In addition, the client device 3300 can execute data transfer successfully to the server device 3300 because the client device 3300 checks the response to the SUCCESS response command from the server device in response to the final Put command. It becomes possible to determine whether or not.

Further, as shown in FIG. 56, by combining it with the switching between the two-way communication and the one-way communication by the communication direction selection unit 3324, only the final Put command, the SUCCE SS response command, is selected in two-way communication. If necessary, in one-way communication, it is possible to perform the operation without requiring a response command for all request commands. [Embodiment 13 of Implementation]

The server device (communication device) of the transfer data transfer system (communication system) according to the thirteenth embodiment of the present invention will be described below. The terms (including members and functions) defined in the other embodiments are also used in this embodiment according to the definition unless otherwise specified.

First, FIG. 58 shows a block diagram of a server device that performs communication using the conventional OBEX protocol.

As shown in FIG. 58, the Sano device (communication device) 3400 has an application layer processing unit 34.

10, OBEX layer processing unit (object exchange layer processing unit) 3420, lower layer processing unit 3430,

, A transmitting unit 3440 and a receiving unit 3450 at least.

The application layer processing unit 3410 requests the OBEX layer processing unit 3420 to process a reception request command and issue a response command according to the user's instruction input to the operation unit (not shown).

The OBEX layer processing unit 3420 includes a control unit 3421, a response notification unit 3422, and a request analysis unit 3423.

[0566] In response to the request from the application layer processing unit 3410, the control unit 3421 notifies the response notifying unit 3422 to generate a response command and issue a response command to the lower layer. Also, in response to the request command reception result notification from the request analysis unit 3423, the application layer processing unit 3410 is notified of the reception result of the request command.

In response to the response command issuance notification from control unit 3421, response notification unit 3422 generates a response command and outputs the generated response command to lower layer processing unit 3430. The request analysis unit 3423 receives the request command output from the lower layer processing unit 3430, analyzes the received request command, and notifies the control unit 3421 that the command analysis result and the request command have been received. Do.

The lower layer processing unit 3430 adds an appropriate lower layer header to the response command from the OBEX layer processing unit 3420 and passes it to the transmitting unit 3440 and, from the reception request command from the receiving unit 3450, an appropriate one. Remove the lower layer header and pass it to the OBEX layer processing unit 3420.

Transmission unit 3440 is a request received from lower layer processing unit 3430 via an infrared communication path or the like. Send a command to the outside.

[0570] The receiving unit 3450 receives the request command transmitted from the other device (client device) via the infrared communication path or the like, and outputs the received request command to the lower layer processing unit 3430.

Next, the operation of the control unit 3421 of the OBEX layer processing unit 3420 in the conventional OBEX server apparatus 3400 shown in FIG. 58 will be described using the flowchart shown in FIG.

Step S101 is a step of determining whether the client device power is also the power that has received the request command. If it has been received, the process goes to step S102, and if it has not been received, the process goes to step S101 again.

[0573] Step S102 is a step of analyzing the client device power request command.

After analysis, the process moves to step S103.

Step S103 is a step of creating a response command to the client device. After creating the response command, the process proceeds to step S104.

Step S 104 is a step of transmitting the response command to the client device.

After the end of transmission, the process proceeds to step S105.

Step S105 is a step of determining whether to end communication. If the process is not ended, the process returns to step S101 again.

[0577] With the above operation, the OBEX layer processing unit 3420 of the conventional server device 3400 can perform communication by receiving and analyzing the request command and generating and transmitting a response command thereto.

However, in the operation of the OBEX layer processing unit 3420 of the above-described conventional server device 3400, a response command is generated and transmitted in response to a request command from the client device. In communication where transmission from the server device 3400 is unnecessary, such as communication, power for generating a response command is wasted.

[0579] In order to solve this, as shown in the flowchart of FIG. 61, server device 3500 (FIG. 60) according to the present embodiment receives the request command of the client device and analyzes it, and then sends it to the client device. It is possible to generate and send a response command and to receive the next request command. Specifically, it is as follows. Step SI 11 is a step of determining whether or not the client device power request command has been received. If it has been received, the process goes to step S112, and if it has not been received, the process goes to step S111 again.

Step S112 is a step of analyzing the received request command. After analysis, the process moves to step S115.

Step S115 is a step of determining whether communication has ended. If not ended, the process returns to step S111.

By performing the above operations in the control unit 3521 of the OBEX layer processing unit 3520 of the Sano device 3500, a response command to the received request command is not generated and transmitted, but the next request command is received. It becomes possible.

Here, FIG. 60 is a block diagram of a server device 3500 according to another embodiment of the present embodiment.

The blocks other than the communication direction selection unit 3524 of the OBEX layer processing unit (object exchange layer processing unit) 3520 are the same as the blocks of the OBEX layer processing unit 3420 of the conventional server device 3400 described above with reference to FIG. Description is omitted because it has a function.

The communication direction selection unit 3524 has a function of selecting whether the communication is one-way communication or two-way communication. Here, one-way communication is communication that requires a response command from the server device in response to a request command from the client device. When the transmitting unit does not exist in the server device, or when the receiving unit does not exist in the client device, although the communication is necessarily one-way communication, the transmitting device and the receiving device are respectively provided by the client device and the Sano device. However, if the signal flow is one-way to the client device server device, it will still be one-way communication. Also, two-way communication is a communication method in which a server device transmits a response command in response to a request command to which client device power is also transmitted, and after analysis of the response command, the client device transmits the next request command again. is there. In this case, for all request commands, a response command is not required, and arrangements are made in advance in both the client device's OBEX layer and the Sano device's OBEX layer! / Not necessary to respond to specific request commands!

[0587] Next, the operation of the control unit 3521 of the O BEX layer processing unit 3520 of the server device 3500 according to the present embodiment will be described using the flowchart in FIG. Step S120 is a step in which the communication direction selection unit 3524 selects two-way communication or one-way communication. In the case of two-way communication, the process transitions to step S121, and in the case of one-way communication, the process transitions to step S131.

Step S121 is a step of determining whether or not the request command from the client device has been received in the two-way communication. If it has been received, the process proceeds to step S122, and if it has been received, the process proceeds to step S121 again.

Step S122 is a step of analyzing a request command from the client device in two-way communication. After analysis, the process moves to step S123.

Step S123 is a step of creating a response command to the client device in two-way communication. After creating the response command, the process proceeds to step S124.

Step S 124 is a step of notifying the lower layer processing unit 3530 in order to transmit the created response command to the client device in two-way communication. After the notification ends, the process transitions to step S125.

Step S125 is a step of determining whether or not to end communication. If it has not ended, the process returns to step S121 again.

[0594] On the other hand, step S131 is a step of determining whether or not a request command from a client device has been received in one-way communication. If it has been received, the process proceeds to step S132, and if it is received, the process proceeds to step S131 again.

Step S132 is a step of analyzing a request command from the client device in one-way communication. After analysis, the flow proceeds to step S135.

Step S135 is a step of determining whether or not the communication has ended in one-way communication. If not ended, the process goes back to step S131.

By performing the above operation in the control unit 3521 of the OBEX layer processing unit 3520 of the Sano device 3500, a response command is generated and transmitted when receiving a request command of the client device in bidirectional communication. Also, in one-way communication, it is possible to receive the next request command without generating or transmitting a response command after receiving a request command from the client device.

[Fourteenth Embodiment of Implementation] The server device (communication device) of the transfer data transfer system (communication system) according to the fourteenth embodiment of the present invention will be described below. The terms (including members and functions) defined in the other embodiments are also used in the present embodiment according to the definition unless otherwise specified.

[0599] FIG. 60 is a block diagram of the server device 3500 according to the present embodiment. That is, it is the same as the thirteenth embodiment described above, and the operation of each block other than the control unit 3521 of the OBEX layer processing unit 3520 is basically the same as the operation of each block in the thirteenth embodiment. Description is omitted because there is.

[0600] The operation of the control unit 3521 of the OBEX layer processing unit 3520 according to the present embodiment will be described using the flowchart shown in FIG.

Step S141 is a step of determining whether or not a Put command of the client device has been received. If it has been received, the process goes to step S142, and if it has not been received, the process goes to step S141 again.

Step S142 is a step of analyzing the received Put command. After analysis, the process transitions to step S143.

Step S143 is a step of determining whether the analyzed Put command is the final Put command but not the final Put command. If it is the final Put command, the process goes to Step S144, and if it is not the final Put command, the process goes to Step S141 again.

[0604] Step S144 is a step of generating a response command to the client device. After completing the generation of the response command, the process transitions to step S145. In this step S144, the generated response command is, for example, a SUCCESS response command when all of the Put commands from the client device have ended normally. Also, in other embodiments, this embodiment does not mention.

[0605] Step S145 is a step of notifying the lower layer processing unit 3530 to transmit the above-mentioned response command to the client device. After the notification ends, transition to step S 146

[0606] Step S146 is a step of determining whether the communication has ended. If not end The process transitions to step S141.

[0607] By performing the above operation in the control unit 3521 of the OBEX layer processing unit 3520 of the Sano device 3500, the CONTINUE response generated in the conventional OBEX layer processing unit for a non-final Put request command It is possible to generate and transmit a SUCCESS response command in response to the final Put request command without generating or transmitting a command, which makes it possible to improve communication efficiency. Also, since the SUCCESS response command to the final Put command is sent to the client device, it is possible to determine whether the client device has successfully transferred data to the server device 3500 or not.

Further, as shown in FIG. 62, by combining it with switching between two-way communication and one-way communication by the communication direction selection unit 3524, at the time of two-way communication, only the final Put command receives the SUCCE SS response command. During one-way communication, it is possible to perform operations without generating and transmitting response commands for all request commands.

[Fifteenth Embodiment of the Implementation]

The transfer data transfer system (communication system) according to the fifteenth embodiment of the present invention is described below with reference to FIG. The terms (including members and functions) defined in the other embodiments are used in accordance with the definition of V in the present embodiment unless otherwise specified.

In this embodiment, an example of communication between mobile phones will be described using FIG. Although a mobile phone is used as a transmitter and a receiver, if either the transmitter or the receiver is a mobile phone, data can be transmitted by infrared rays according to any of the present invention methods. Alternatively, if the reception is possible, the opposite device may not be a mobile phone.

In FIG. 64, data in the mobile phone A is transmitted to the mobile phone B using infrared rays. When the mobile phone B receives the data transmitted from the mobile phone A, the received data is stored in the memory in the mobile phone B or in the connected external memory. The aforementioned data is text data, image data, voice data, telephone directory data, system information, etc., and is not limited to a specific format. The data in the mobile phone A may be either data in the internal memory of the mobile phone A or data in an external memory (nonvolatile memory such as an SD card) connected to the mobile phone A. For example, at the time of two-way communication, the transmitting side (mobile phone A) assigns a serial number to the IrLAP UI frame with no restriction on the window size by the method of any of the above-described embodiments. Transmit, and retransmit if necessary according to the contents of the reply frame of the receiver (mobile phone B), perform error detection and serial number analysis on the receiver (mobile phone B), if necessary, and By making a retransmission request, high quality communication can be performed.

Also, for example, at the time of one-way communication, on the transmitting side (mobile phone A), the window size is not limited according to any of the methods of the above-described embodiments. The frame is given a serial number and transmitted, and the receiving side (mobile phone B) can perform high-quality communication by performing error detection and serial number analysis.

[0614] With this, by using the UI frame, it is possible to reduce the number compared with the opposite station within the limitation of the window size in the conventional I frame, and the transfer efficiency is high and the quality is high. It is possible to perform high communication.

[0615] In particular, when using SMP in a mobile phone, by determining an appropriate transmitter time-out time for each file to be transmitted, communication efficiency is high when an error occurs, and a communication path is provided. Is possible. Specifically, for files that are considered to be time-consuming for data processing in the receiver (for example, «files that must be decoded such as JPEG images and MPEG moving images), the frame after BL = 1 has been transmitted. Increase the latency of frames that contain RS, and reduce the latency when sending files such as text files that do not seem to take much time to process data.

Sixteenth Form of Implementation

The transfer data transfer system (communication system) according to the sixteenth embodiment of the present invention will be described below with reference to FIG. The terms (including members and functions) defined in the other embodiments are used in accordance with the definition of V in the present embodiment unless otherwise specified.

In this embodiment, an example of communication between a mobile phone and a display device will be described with reference to FIG. Although a mobile phone is used as a transmitter, if the data can be transmitted by infrared rays etc. by any of the methods of the present invention, the transmitter is not a mobile phone. It does not matter. In addition, the display device may be the transmission side.

In FIG. 65, data in the mobile phone A is transmitted to a display device B (such as a TV or a monitor) using infrared light. The display device B performs appropriate processing on the data transmitted from the mobile phone A. For example, in the case of image data, display is performed by decompressing compressed data if necessary. But it is not limited to this. Further, the above-mentioned data are text data, image data, voice data, telephone directory data, system information and the like, and are not limited to a specific format. Further, the data in the mobile phone A may be either data in the internal memory of the mobile phone A or data in an external memory (nonvolatile memory such as an SD card) connected to the mobile phone A.

For example, at the time of two-way communication, the transmitting side (mobile phone A) assigns a serial number to the IrLAP UI frame with no window size restriction by any of the methods described in the above embodiments. Then, it retransmits if necessary according to the contents of the reply frame on the receiving side (display device B), and performs error detection and serial number analysis on the receiving side (display device B), if necessary. By making a retransmission request, high quality communication can be performed.

Also, for example, at the time of one-way communication, on the transmitting side (mobile phone A), the window size is not limited according to any of the methods of the above-described embodiments. It is possible to perform communication with high quality by performing error detection and analysis of the serial number on the receiving side (display device B) by assigning the serial number to the frame and transmitting it.

[0621] As a result, by using the UI frame, it is possible to reduce the number compared with the opposite station within the limitation of the window size in the conventional I frame, and the transfer efficiency is high and the quality is high. It is possible to perform high communication.

In particular, when using SMP as the display device, transmission is performed by setting the reception buffer size notified to the transmitter by the display device at the time of connection to the image size of JPEG images (about several hundreds of KB and several MB). The batch transmission data size of the machine can be set to a size that allows one JPEG image to be transmitted at one time.

Thus, for example, when the display apparatus has two reception buffers and reception of JPE G image data to one reception buffer is completed, the reception buffer is switched, and the second reception is performed. While receiving the next JPEG image in the reception buffer, processing such as decoding of the JPEG data in the first reception buffer can be easily performed.

[Seventeenth Form of Implementation]

The transfer data transfer system (communication system) according to the seventeenth embodiment of the present invention is described below with reference to FIG. The terms (including members and functions) defined in the other embodiments are used in accordance with the definition of V in the present embodiment unless otherwise specified.

[0625] In this embodiment, an example of communication between a mobile phone and a printing apparatus will be described using FIG. Although a mobile phone is used as a transmitter, the transmission device may not be a mobile phone as long as data can be transmitted by infrared rays or the like according to any method of the present invention. Also, the printing apparatus may be the transmission side.

[0626] In Fig. 66, data in the mobile phone A is transmitted to the printing apparatus B using infrared rays. The printing device B performs appropriate processing on the data transmitted from the mobile phone A. For example, if it is image data, printing is performed by decompressing compressed data if necessary. But it is not limited to this. Also, the above-mentioned data are text data, image data, telephone directory data, system information, etc., and it is not limited to a specific format. The data in the mobile phone A may be either data in the internal memory of the mobile phone A or data in an external memory (nonvolatile memory such as an SD card) connected to the mobile phone A.

[0627] For example, at the time of two-way communication, the transmitting side (mobile phone A) transmits an IrLAP UI frame having no window size limitation by any of the methods described in the above embodiments. A number is added and transmitted, and if necessary, retransmission is performed according to the contents of the reply frame on the receiving side (printing device B), and on the receiving side (printing device B), error detection and serial number analysis are performed. It is possible to perform high quality communication by making a retransmission request if necessary.

[0628] Also, for example, at the time of one-way communication, on the transmitting side (mobile phone A), the window size is not limited according to any of the methods of the above-described embodiments. The frame is assigned a serial number and transmitted, and the receiving side (printing apparatus B) detects an error and By analyzing the serial number, it is possible to communicate with high quality!

[0629] Thus, by using the UI frame, it is possible to reduce the number compared with the opposite station within the limitation of the window size in the conventional I frame, and the transfer efficiency is high and the quality is high. It is possible to perform high communication.

[0630] In particular, when using SMP as the printing apparatus, the primary size can be set by setting the reception buffer size that the printing apparatus notifies the transmitter at connection time to the image size of JPEG images (about several hundred KB and several MB). The batch transmission data size of the station can be set to a size that allows one JPEG image to be transmitted at one time.

Thus, for example, when the printing apparatus has two reception buffers and one reception buffer receives JPE G image data, the reception buffer is switched, and the second reception buffer is next received. While receiving a JPEG image, it is easy to perform processing such as decoding JPEG data in the first reception buffer. In addition, when printing is in a state where it is not possible to receive the next data during printing, the printer notifies the transmitter that a error has occurred in a pseudo manner even if no error has occurred, and the transmitter power is retransmitted. It is possible to earn time, for example, by

Eighteenth Form of Implementation!

The transfer data transfer system (communication system) according to the eighteenth embodiment of the present invention is described below with reference to FIG. The terms (including members and functions) defined in the other embodiments are used in accordance with the definition of V in the present embodiment unless otherwise specified.

In this embodiment, an example of communication between a mobile phone and a recording device will be described with reference to FIG. Although a mobile phone is used as a transmitter, the transmission device may not be a mobile phone as long as data can be transmitted by infrared rays or the like according to any method of the present invention. Also, the recording apparatus may be the transmission side.

[0634] In Fig. 67, data in the mobile phone A is transmitted to the recording device B using infrared light. The recording device B performs appropriate processing on the data transmitted from the mobile phone A. For example, when it is image data, the memory in the recording device B or the external memory connected to the recording device B Record on Memory in the recording device B is a volatile memo such as SDRAM It is also possible to use any non-volatile memory such as flash memory, recordable DVD, HDD drive, etc. as long as it can record temporarily or semi-permanently. Further, the above-mentioned data are text data, image data, voice data, telephone directory data, system information and the like, and are not limited to a specific format. The data in the mobile phone A may be either data in the internal memory of the mobile phone A or data in an external memory (nonvolatile memory such as an SD card) connected to the mobile phone A.

[0635] For example, at the time of two-way communication, the transmitting side (mobile phone A) transmits an IrLAP UI frame having no window size limitation by any of the methods described in the above embodiments. A number is added and transmitted, and if necessary, retransmission is performed according to the contents of the reply frame on the receiving side (recording device B), and on the receiving side (recording device B), error detection and serial number analysis are performed. It is possible to perform high quality communication by making a retransmission request if necessary.

[0636] Also, for example, at the time of one-way communication, on the transmitting side (mobile phone A), the window size is not limited according to one of the methods of the above-described embodiments. The frame is assigned a serial number and transmitted, and the receiving side (recording apparatus B) can perform high-quality communication by performing error detection and serial number analysis.

[0637] With this, by using the UI frame, it is possible to reduce the number compared with the opposite station within the limitation of the window size in the conventional I frame, and the transfer efficiency is high and the quality is high. It is possible to perform high communication.

[0638] In particular, when using SMP as a recording device, transmission is performed by setting the reception buffer size notified to the transmitter by the recording device at connection time to the frame size (about several hundred KB to several MB) of the MPEG moving image. The batch transmission data size of the machine can be set to a size that allows one frame to be transmitted at one time.

Thus, for example, when the recording apparatus has two reception buffers and one frame of reception data has been received in one reception buffer, the reception buffer is switched, and the second reception buffer is switched to the next reception buffer. Processing such as decoding frame data in the first reception buffer can be performed easily while receiving frame data.

Nineteenth Form of Implementation! Another embodiment of the present invention will be described below with reference to FIGS. 68 to 90. The communication protocol described in the present embodiment is applied to the first to eighteenth embodiments. Therefore, the terms defined in the first to eighteenth embodiments are also used in the present embodiment according to the definition unless otherwise specified.

[0641] (1) Communication layer

FIG. 68 is a schematic diagram showing the correspondence relationship between the OSI 7 hierarchical model, the hierarchy of IrDA, and the hierarchy of the communication system according to the present invention.

[0642] Each communication layer of the communication system according to the present embodiment also has the same function as that of the corresponding layer of the OSI seven-layer model. However, as shown in FIG. 68, the communication system has a six-layer structure in which the session layer and the presentation layer are one!

In the present embodiment, for convenience of explanation, description will be made based on IrSimple, which is an application example of the present invention. However, the present invention is not limited to IrSimple. Note that IrSimple is an improvement on some of the functions of the conventional IrDA.

In the present embodiment, in accordance with IrSimple, the data link layer, the network layer, the transport layer, and the session layer + the presentation layer may be referred to as LAP, LAMP, SMP, and OBEX, respectively. In addition, when the communication layer is distinguished by transmitters and receivers, "P" is added to the transmitter (primary station) and "S" to the receiver (secondary station). For example, "LAP (P)" means the data link layer of the transmitter.

[0645] (2) Sequence between transmitter and receiver

(2-1) Connection sequence

[A] With response

FIG. 69 (a) is a sequence diagram showing a connection sequence of the present embodiment (with response). Further, FIG. 69 (c) is an explanatory view showing a data structure of communication data in the connection sequence of the present embodiment (with response).

[0646] In the present embodiment (with response), the same function as the search can be provided to the SNRM command by using the global address for the Destination Device Address of the SNRM (Fig. 69 (c) SNRM command). Also, in the present embodiment (with response), in the SN RM command and UA response that are connection packets of the data link layer, upper layers such as the network layer, transport layer, session layer, presentation layer, etc. are included. Insert parameters and commands required for connection. As a result, it is possible to condense connection packets for connecting the upper layers required in the conventional IrDA into one packet.

[0648] Therefore, search and connection sequences can be performed with one packet pair, which conventionally required multiple packets.

[0649] [B] No response

FIG. 69 (b) is a sequence diagram showing a connection sequence of the present embodiment (without response). Further, FIG. 69 (c) is an explanatory view showing a data structure of communication data in the connection sequence of the present embodiment (no response). In the present embodiment (no response), the UA response (UA response for SNRM in FIG. 69 (c)) is unnecessary.

[0650] Depending on the user or application and data type, it is possible to select a communication scheme in which the response from the receiver is omitted. In this case, as shown in FIG. 38 (b), it can be assumed that the search and connection have been completed only by the SNRM command.

As described above, the connection sequence of this embodiment shortens the time required for connection by putting together the connection requests of a plurality of communication layers. Easy to connect. Therefore, the communication path is easily disconnected, and it is particularly suitable for, for example, infrared communication. However, it is also effective in other wireless communications including IEEE802.11 wireless, Bluetooth, and wired communications.

Further, in the present embodiment, an example in which connection of all communication layers is connected by one communication will be described, but the present invention is not limited to this. For example, after connecting one communication layer, the remaining plural communication layers may be connected. Also, connection of one communication layer may be performed by multiple times of communication. For example, if the network layer connection requires two communications, combine the data link layer connection and the first connection of the network layer into one connection request, and the second connection of the network layer and the transport layer You may combine the connections in one connection request into one.

(2-2) Data exchange sequence [A] There is a response

Figs. 70 (a) and 70 (b) are sequence diagrams showing a data exchange sequence according to the present embodiment (with response). Further, FIG. 70 (a) is an explanatory view showing a data structure of communication data in the data exchange sequence of the present embodiment (with response).

In the present embodiment (with response), the responses of the lower layer and the upper layer for each piece of data are reduced as much as possible, and after transmitting a large amount of data, whether or not an error or helplessness is sent back is sent.

[0655] At the time of data communication, the transmitter is constructed of a sequential packet number, a flag for asking whether a problem has occurred with received data, and divided data obtained by dividing the above data according to the size of the packet. Use a packet.

[0656] As shown in FIG. 70 (a), the transmitter transmits a predetermined number of packets and then transmits a packet with the flag turned on. On the other hand, when the receiver receives a packet from the beginning of the previous data or the above flag is turned on and sends back a response, it indicates that it has received successfully if it detects no error. Notify the transmitter. Also, when the receiver receives a packet from the beginning of the previous data or the above flag is turned on and sends back a reply, if an error is detected, the subsequent packets that can not be received are received. The divided data portion is ignored, only the flag is checked, and if the flag is on, the transmitter is notified of a packet number that can not be received due to an error.

[0657] Furthermore, when the transmitter receives a signal indicating that it has been correctly received, the transmitter transmits from the next packet. Also, when the transmitter is notified that an error has occurred, it retransmits from the packet number which could not be received to the packet with the above flag turned on.

[0658] Thereby, packets can be packed and efficient communication can be performed.

As shown in FIG. 70 (a), a UI frame (FIG. 71 (b)) is used in the present embodiment (with response). For this reason, the packet link can not be recognized in the data link layer (LAP layer), and is detected in the transport layer.

[0660] The data portion of the transport layer of the UI frame is provided with a sequential number, a flag for data confirmation, a flag indicating whether it is the last packet of data, whether the received data was normal, and these flags Send [0661] [B] No response

FIGS. 72 (a) and 72 (b) are sequence diagrams showing a data exchange sequence according to the present embodiment (without response). Further, FIG. 72 (b) is an explanatory view showing a data structure of communication data in the data exchange sequence of the present embodiment (no response).

[0662] In this embodiment (no response), only the data integrity is checked in the case where the receiver response is not required. Therefore, the transmitter assigns a sequence number to the packet and transmits all data continuously.

[0663] Then, the receiver only confirms whether or not there is an error, and if it is received normally, after receiving all the data, it recognizes that the reception is normal within the receiver, and Perform the action of The next operation in this case is, for example, to display, print, or save the received data. On the other hand, when an error is detected, the receiver recognizes that the reception was not successful and performs the following operation. The next action in this case is an indication to notify the user of the failure or to be in the state of waiting for the next reception.

Also in the present embodiment (without response), the UI frame (FIG. 71 (b)) shown in FIG. 72 (b) is used.

[0665] (2— 3) Disconnection Sequence

[A] With response

FIG. 73 (a) is a sequence diagram showing a disconnection sequence of the present embodiment (with response). Further, FIG. 73 (c) is an explanatory view showing a data structure of communication data in the disconnection sequence of the present embodiment (with response).

[0666] As shown in FIG. 73 (c), in the present embodiment (with response), the parameters and commands necessary to disconnect the upper layers such as the network layer, transport layer, session layer, and presentation layer are displayed in DISC. Inserted in the command and UA response.

[0667] This allows the disconnection sequence to be performed with one packet pair, which conventionally required a plurality of packets.

[0668] [B] No response

FIG. 73 (b) is a sequence diagram showing a disconnection sequence of the present embodiment (without response). Further, FIG. 73 (c) shows the case of the disconnection sequence of the present embodiment (with response). It is explanatory drawing which shows the data structure of communication data. In addition, this embodiment (No response

Does not require a UA response (the UA response in Figure 73 (c)).

[0669] As shown in FIG. 73 (b), in the present embodiment (without response), when connection is made without requiring a response from the receiver, it is possible to conclude that search and disconnection have been completed only by the DISC command. .

(0) Transmitter, sequence in receiver

For convenience of explanation, in Figure 74 to Figure 90, the data link layer is LAP, and the network layer is LAMP.

, Transport layer TTP or SMP, session layer and presentation layer

Indicated as BEX. Also, in order to distinguish the communication layer between transmitter and receiver, the transmitter "P"

, Add "S" to the receiver. For example, "LAP (P)" means the data link layer of the transmitter.

[0671] (3-1) Connection Sequence

[A] With response

FIG. 74 is a sequence diagram showing a connection sequence of the present embodiment (with response). FIGS. 75 (a) and 75 (b) are explanatory diagrams showing data structures of communication data in the connection sequence of the present embodiment (with response).

As shown in FIG. 74, in the present embodiment (with response), connection preparation is performed for both the transmitter and the receiver. After that, the transmitter passes the upper layer request as it is to the lower layer and transmits it as one packet (SNRM). On the other hand, the receiver receives the SNRM packet and reports that it can connect to the upper layer as it is, then passes the response of OBEX (S) to the lower layer as it is, and as one packet (UA) Send. The transmitter concludes the connection by receiving the UA, and sends notification (Connect. Confirm) to the upper layer!

The sequence in the transmitter and the receiver at this time is as follows.

First, each communication layer of the transmitter will be described.

[0675] When OBEX (P) receives an application connection request, it immediately sends a connection request command to the lower layer (S MP (P)) and issues a connection request function (Primitive). Produce. Also, when OBEX (P) receives the connection confirmation function from SMP (P), OBEX (P) confirms the response of the OBEX connection from the data, and responds that there is no problem (Success). If it is the connection is complete.

[0676] The SMP (P) receives the connection request function from the OBEX (P) and immediately transmits the data of the OBEX (P) connection request function to the receiver SMP (S). Add a parameter to generate a connection request function for the lower layer (LMP (P)). Also, when SMP (P) receives the connection check function from LMP (P), it extracts the parameters generated by the receiver's SMP (S) from the data data of the function, checks the value, and End the negotiation with). In addition, SMP (P) also transmits the data strength of the connection check function with the parameters of SMP (S) removed as the connection check function to OBEX (P).

[0677] The LMP (P) receives the connection request function from the SMP (P) and promptly sends the data of the connection request function of the SMP (P) to the parameters required for communication with the LMP (S) of the receiver. And generate a connection request function for the lower layer (LAP (P)). Also, when LMP (P) receives the connection check function from LAP (P), it extracts the nolometer generated by LMP (S) of the receiver from the data of the function, and confirms the value, and LMP (S) End the negotiation with Also, LMP (P) transmits the data obtained by removing the parameter of LMP (S) from the data strength of the connection confirmation function as a connection confirmation function to SMP (P).

[0678] Normally, a Link Service Access Point (LSAP) is defined to manage logical ports. And there is no need to use LMP when making one-to-one connection. In this case, use a connectionless value as a fixed value for LSAP. This eliminates the need to exchange LMP connection parameters.

[0679] LAP (P) receives the connection request function from LMP (P), promptly transmits the data of LMP (P) connection request function, and the parameters necessary for communication with LAP (S) of the receiver. And output an SNRM command to the physical layer of the receiver. Also, when the LAP (P) receives the physical layer strength UA response of the receiver, it extracts the parameters generated by the LAP (S) of the receiver from the data of the UA response, confirms the values, and checks the LAP (S) End the negotiation with. Also, LAP (P) transmits data obtained by removing the parameter of LAP (S) from the data of UA response as a connection confirmation function to LMP (P).

[0680] Next, each communication layer of the receiver will be described.

[0681] OBEX (S) receives the connection request function from the application and enters the reception standby state . Also, when OBEX (S) receives the connection notification function (Indication) also for the lower layer (SMP (S)) power, it checks the OBEX connection command from the data, and if there is no problem, the response says Success. Is output to SMP (S) as a connection response function (Response), and connection is completed.

The SMP (S) receives the connection request function from the OBEX (S), and stands by for reception. Also, when SMP (S) receives the connection notification function from the lower layer (SMP (S)), it extracts the parameter generated by the transmitter SMP (P) from the data of the function, Create the response parameter of the above, remove the parameter of SMP (P) from the data of the above function, issue the connection request function containing the data to OBEX (S), and then return the connection response function from OBEX (S) I will wait. When SMP (S) receives the connection response function from OBEX (S), it adds the above-mentioned response parameter to the data of the connection response function of OBEX (S) for LMP (S), Generate a connection reply function to LMP (S) and complete the SMP layer negotiation.

The LMP (S) receives the connection request function from the SMP (S) and stands by for reception. When LMP (S) receives a connection notification function from the lower layer (LAP (S)), it extracts the parameter generated by the transmitter LMP (P) from the data of the function, Create a response parameter, remove the parameter of data function LMP (P) of the above function, issue a connection request function containing the data to SMP (S), and then connect response function from SMP (S) wait. When LMP (S) receives a connection response function from SMP (S), LMP (S) adds the above-mentioned response parameter to the data of SMP (S) connection response function. , Generate a connection reply function to LAP (S), and complete the LMP layer negotiation.

[0684] Note that, usually, LSAP (Link Service Access Point) is defined to manage logical ports. And there is no need to use LMP when making one-to-one connection. In this case, use a connectionless value as a fixed value for LSAP. This eliminates the need to exchange LMP connection parameters.

[0685] The LAP (S) receives the connection request function of the LMP (S) and enters the reception standby state. Also, when the LAP (S) receives the physical layer strength SNRM command, it extracts the parameter generated by the transmitter LAP (P) from the data of the SNRM command, and the parameter of the LAP (P) from the data of the SNRM command. Issued a connection request function containing the data to LMP (S) After that, create a response parameter for it and wait for the connection response function from LMP (S). Also, when the LAP (S) receives the connection response function from the LMP (S), it adds the above-mentioned response parameter to the data of the LMP (S) connection response function to Output the speech and complete the LAP layer negotiation.

[0686] [B] No response

FIG. 76 is a sequence diagram showing a connection sequence of this embodiment (no response). Further, FIG. 75 (a) is an explanatory view showing a data structure of communication data in the connection sequence of the present embodiment (without response).

[0687] As shown in FIG. 76, in the present embodiment (without response), connection preparation is performed for both the transmitter and the receiver. After that, the transmitter passes the upper layer request as it is to the lower layer and transmits it as one packet (SNRM). Then, when the transmitter transmits the SNRM packet, the LAP (P) raises the notification (Connect. Confirm) from the LAP (P) to the upper layer as the connection completion. On the other hand, the receiver, upon receiving the SNRM packet, notifies that the connection to the upper layer has been made as it is, and completes the connection when notified to the OBEX (S).

The sequence in the transmitter and the receiver at this time is as follows.

First, each communication layer of the transmitter will be described.

[0690] OBEX (P) immediately generates connection request function (Primitive) by putting connection request command into lower layer (S MP (P)) data when application connection request is received. Produce. Also, if OBEX (P) receives the connection confirmation function from SMP (P), the connection will be completed.

[0691] The SMP (P) receives the connection request function from the OBEX (P) and immediately transmits the data of the OBEX (P) connection request function to the receiver SMP (S). Add a parameter to generate a connection request function for the lower layer (LMP (P)). Also, when SMP (P) receives the connection confirmation function from LMP (P), it concludes the SMP layer negotiation, assuming that the transmitted parameters can negotiate. Also, at this time, SMP (P) sends a connection confirmation function to OBE X (P).

[0692] The LMP (P) receives the connection request function from the SMP (P) and promptly sends the data of the connection request function of the SMP (P) to the parameters required for communication with the LMP (S) of the receiver. Add Generate a connection request function to the lower layer (LAP (P)). Also, LMP (P) ends negotiation of LMP layer assuming that negotiation can be performed using the transmitted parameters when LAP (P) force also receives the connection confirmation function. Also, at this time, LMP (P) sends a connection confirmation function to SMP (P).

[0693] Usually, a Link Service Access Point (LSAP) is defined to manage logical ports. And there is no need to use LMP when making one-to-one connection. In this case, use a connectionless value as a fixed value for LSAP. This eliminates the need to exchange LMP connection parameters.

[0694] The LAP (P) receives the connection request function from the LMP (P), promptly transmits the data of the LMP (P) connection request function, and the parameters necessary for communication with the LAP (S) of the receiver. And output an SNRM command to the physical layer of the receiver. Also, when the LAP (P) outputs the SNRM command, it concludes the negotiation of the LA p layer, assuming that the transmitted parameters can be negotiated. At this time, LAP (P) sends a connection confirmation function to LMP (P).

[0695] Next, each communication layer of the receiver will be described.

[0696] The OBEX (S) receives the connection request function also from the application power and stands by for reception. Also, if OBEX (S) receives lower layer (SMP (S)) power as well as the connection notification function (Indication), the middle power of the data also confirms the OBEX connection command, and if there is no problem, the connection is completed. I assume.

[0697] The SMP (S) receives the connection request function from the OBEX (S) and stands by for reception. Also, when SMP (S) receives the connection notification function from the lower layer (SMP (S)), it extracts the parameter generated by the transmitter SMP (P) from the data of the function, and extracts that parameter. Use to complete the negotiation. And SMP (S) removes the parameter of SMP (P) from the data of the above function! Sends a connection request function containing overwhelmed data to OBEX (S).

[0698] The LMP (S) receives the connection request function from the SMP (S) and stands by for reception. When LMP (S) receives a connection notification function from the lower layer (LAP (S)), it extracts the parameter generated by LMP (P) of the transmitter from the data of the function, and uses that parameter And complete the negotiation. And LMP (S) is the data power of the above function LMP ( Remove the parameters of P)! Send a connection request function containing the overwhelmed data to SMP (S).

[0699] Usually, a Link Service Access Point (LSAP) is defined to manage logical ports. And there is no need to use LMP when making one-to-one connection. In this case, use a connectionless value as a fixed value for LSAP. This eliminates the need to exchange LMP connection parameters.

[0700] The LAP (S) receives the connection request function of LMP (S) and enters the reception standby state. Also, when the LAP (S) receives the physical layer strength SNRM command, it extracts the parameter generated by the transmitter LAP (P) from the data of the SNRM command, and uses that parameter to complete the negotiation. Then, the LAP (S) issues a connection request function to the LMP (S) including the data strength of the above function and the data excluding the parameter of the LAP (P).

[0701] (3-2) Data exchange sequence

[A] With response

FIG. 77 is a sequence diagram showing a data exchange sequence of the present embodiment (with response). Further, FIG. 78 is an explanatory view showing a data structure of communication data in the data exchange sequence of the present embodiment (with response).

[0702] As shown in FIG. 77, in the present embodiment (with response), the transmitter generates a PUT command, which is transmitted to the lower layer, and is output as a UI frame (FIG. 71 (b)). .

On the other hand, the receiver receives the data and raises the notification to the upper layer. At this time, SMP (

In S), the upper layer OBEX (S) is notified that data will continue (status = truncated).

[0704] The transmitter transmits a certain number of packets, and then transmits the flag with a check to confirm that the data has arrived properly. In response to this, in the receiver, the SMP (S) notifies the transmitter of the error force or, if there is an error, the number in which the error occurred.

[0705] The transmitter outputs the next packet group if there is no error, and if there is an error, it retransmits the packet after the packet having the error.

[0706] The transmitter, when the end of data is reached, indicates that the flag indicating the end of data is O.

Set to N and send. On the other hand, if the receiver is SMP (S) and this flag is ON , Notify OBEX (S) that the data is complete (status = OK), and wait for OBEX (S) response. Then, when a response of OBEX (S) is generated, the data is transmitted to the lower layer and output as a UI frame.

[0707] The transmitter ends normally if the received response is Success.

The sequence in the transmitter and the receiver at this time is as follows.

[0709] At the transmitter, OBEX (P) outputs a PUT command to the lower layer as a data transmission function. However, if OBEX (P) can be sent by SMP (P) without requiring PUT command responses (continuing return if normal) other than PUT Final (last PUT) command. , Output the next command. In the case of commands other than PUT Final command or PUT command, wait for the data notification function from the lower layer, and finish the command seeing the response in the data.

Here, the data transmission function is a function (Data Request) that requests data transmission from the lower layer. Also, the data notification function is a function (Data Indicate) that notifies that lower layer strength data has been received.

[0711] At the receiver, the OBEX (S) receives the lower layer power as well as the data notification function to receive data.

However, OBEX (S) does not return a response to PUT commands other than PUT Final command, and returns a response as a data transmission function for commands other than PUT Final command or PUT command.

Here, the headers and the like of the data transmission function and data notification function of the upper layer and the lower layer, which are common to the transmitter and the receiver, will be described.

[0713] When the SMP receives the data transmission function from the OBEX, (a) the LMP can transmit the data to the LMP when the size that can be transmitted by the LMP is smaller than the size of the data in the data transmission function. (B) When the size that can be transmitted by LMP is larger than the size of data in the data transmission function, combine some data and combine larger data below the size that can be transmitted. create. In addition, the SMP has a sequential number, an argument for inquiring the other device about the data reception status, an argument indicating the end of the data, an argument indicating that the SMP of the other device requires an OBEX response, and the received data is normal. Create an SMP header with an argument indicating whether it was. And this The data transmission function including the data obtained by adding the SMP header of the above to the divided or combined data is issued to the LMP.

[0714] Further, when the SMP receives the LMP force data notification function, it extracts the SMP header from the data in the function, and confirms the force with which the sequence number is normal (that is, the force coming in order without missing). Do. Then, if it is normal, it issues a data notification function to OBEX. At this time, the data notification function may output V for each data notification function from the lower layer, or may output V and the data notification function data from several lower layers together! / ,.

[0715] The SMP (P) of the transmitter converts the data transmission function of OBEX (P) into the data transmission function to LMP (P), and specifies data transmission of a certain number of data amounts. Issue a function. After that, SMP (P) sets the argument for inquiring data reception status to the receiver to True, issues a data transmission function, and waits for the data notification function of LMP (P).

[0716] The SMP (P) analyzes the SMP header in the data notification function of LMP (S) power, and indicates that an argument indicating whether the received data was normal was received correctly. If it is ready to send the next data, it is ready to send to OBEX (P). That is, data from OBEX (P) can be received in this state.

[0717] On the other hand, SMP (P) analyzes the SMP header of the received data notification function of LMP (S) power, and the argument indicating whether the received data was normal or not is normal. If it indicates that the power has not been received, the data transmission function power notified that the power could not be received normally Generates up to the data transmission function with the argument True asking the data reception status to the external device Do. The SMP (P) repeats regenerating for a specified number of times until data from all data transmission functions are notified to the receiver.

Furthermore, when SMP (P) receives a data transmission function whose argument is True from OBEX (P) is True, it enters the last data of the data transmission function, LM P The data transmission function to (P) is issued with an argument indicating that this data transmission function is the end of data or an argument indicating that a response of OBEX (S) of the receiver is required.

On the other hand, when the receiver SMP (S) receives the data notification function from LMP (S), , The data indicating that the header of the SMP (S) is removed from the OBEX (S) when the argument indicating that the response of the end of data or the receiver's OBEX (S) is required is True. Issue a notification function.

In addition, when the SMP (S) receives a data notification function LMP (S), the SMP (S) analyzes the SMP header from the data in the data notification function, and confirms the sequential number. The SMP (S) can normally receive an argument indicating whether the received data was normal or not, if it can receive normally until the header for which the argument asking the data reception state to the receiver is True is received. To create an SMP header to indicate that the data is sent to LMP (S) as a data transmission function.

On the other hand, when the SMP (S) detects that the reception has failed normally, it stores the number of the SMP header expected to be not received properly. For example, if 0, 1, 2, 3, 5 is received, if the 5th should be 4 and if 4 is not received, the number expected to be not successfully received is 4 and so on. Become. Then, after that, SMP (S) checks only if the argument asking the receiver of the SMP header for data reception is True and stops the output of the data notification function to OBEX (S).

[0722] The SMP (S) can not normally receive an argument indicating whether the received data is normal or not when it receives a data notification function whose argument for inquiring data reception status from the receiver is True. And an SMP header number inserted into the sequential number entry field to create an SMP header, and direct it as LMP (S) as data to issue a data transmission function .

In addition, SMP (S) receives a data notification function whose argument indicating that it is the end of data or that an argument indicating that a response of OBEX (S) of the receiver is necessary is True. In this case, after outputting the data notification function to OBEX (S), wait for a data transmission request from OBEX (S).

[0724] When the SMP (S) receives a data transmission request from the OBEX (S), it creates an SMP header which is assumed to be successfully received as an argument indicating whether the received data was normal, It is added to the data of the data transmission request of OBEX (S), and the data transmission function is issued to LMP (S). If there is an error, the notification to OBEX (S) will stop. In order to wait, it will be only when it was normal when waiting.

Next, when the LMP receives the upper layer power data transmission request function, it adds an LMP header to the data in the function to create data, and issues a data transmission request function containing the data to the LAP. . Also, when LMP receives the LAP force data notification function, it creates data from the data in the function excluding the LMP header, and issues a data notification function containing the data in SMP.

[0726] It is not necessary to use LMP when making one-to-one connection. in this case,

The LMP header contains an LSAP with a connectionless value.

[0727] When the LAP receives a data transmission request function from the LMP, it adds a LAP header to the data in the function to create data, and issues a UI frame containing the data to the physical layer. Also, when the LAP receives a data reception notification from the physical layer, it generates the data obtained by removing the LAP header from the data of the UI frame, and issues a data notification function including the data in the LMP. In the present embodiment, the LAP header includes a connection address and a UI indicator.

[0728] [B] No response

FIG. 79 is a sequence diagram showing a data exchange sequence of the present embodiment (without response). Further, FIG. 78 is an explanatory view showing a data structure of communication data in the case of the data exchange sequence of the present embodiment (without response).

[0729] As shown in FIG. 79, in the present embodiment (without response), the transmitter generates a PUT command, which is transmitted to the lower layer and output as a UI frame.

[0731] Then, the transmitter turns on a flag indicating that it is the end of data when it is the end of data, and transmits it. On the other hand, the receiver, when the SMP (S) turns on this flag, notifies the OBEX (S) that the data is complete (status = OK), and ends the data exchange sequence.

The sequence in the transmitter and the receiver at this time is as follows. [0733] At the transmitter, OBEX (P) outputs a PUT command to the lower layer as a data transmission function. However, OBEX (P) can terminate commands without requiring responses to all commands. Then, OBEX (P) outputs the next command when transmission is possible with SMP (P).

[0734] At the receiver, the OBEX (S) receives the lower layer power as well as the data notification function, and receives only data without returning a response to all commands.

[0735] Here, headers and the like in the data transmission function and data notification function of the upper layer and the lower layer, which are common to the transmitter and the receiver, will be described.

[0736] When the SMP receives the data transmission function from the OBEX, (a) the LMP can transmit the data to the LMP when the size that can be transmitted by the LMP is smaller than the size of the data in the data transmission function. (B) When the size that can be transmitted by LMP is larger than the size of data in the data transmission function, combine some data and combine larger data below the size that can be transmitted. create. In addition, the SMP has a sequential number, an argument for inquiring the other device about the data reception status, an argument indicating the end of the data, an argument indicating that the SMP of the other device requires an OBEX response, and the received data is normal. Create an SMP header with an argument indicating whether it was. Then, a data transmission function including this SMP header added with the above divided or combined data is issued to the LMP.

Furthermore, when the SMP receives the LMP force data notification function, it extracts the SMP header from the data in the function, and confirms the force with which the sequence number is normal (that is, the force coming in order without missing). Do. Then, if it is normal, it issues a data notification function to OBEX. At this time, the data notification function may output V for each data notification function from the lower layer, or may output V and the data notification function data from several lower layers together! / ,.

[0738] The transmitter's SMP (P) converts the data transmission function of OBEX (P) into a data transmission function to LMP (P). Then, when it receives a data transmission function in which the argument that is the end of the data is False from OBEX (P), the data with the SMP header added to the data is emitted to LMP (P). On the other hand, if SMP (P) receives a data transmission function whose argument that is the end of the data is True from OBEX (P), SMP (P) receives that data transmission function. Data transmission function to LMP (P) containing the last data of the number, an argument indicating that this data transmission function is the end of data, or a response of OBEX (S) of the receiver is required. Make an argument indicating True and issue.

On the other hand, when the SMP (S) of the receiver receives the data notification function from the lower layer, it analyzes the SMP header from the data in the data notification function, and confirms the sequential number. Then, if the SMP (S) analyzes the SMP header and confirms that the reception is normal, it issues a data transmission function to the LMP (S).

[0740] On the other hand, if the SMP (S) detects that the power can not be received normally, OB

Notify EX (S) as an error. For example, when 0, 1, 2, 3, 5 is received, the 5th is 4 when it should be 4 but not received.

[0741] Then, from then on, SMP (S) waits for the argument indicating the end of the data in the SMP header or the argument indicating that the response of OBEX (S) of the receiver is required to be True. The ability to receive a data notification function that is True (but not notify OBEX (S) upon reception), the ability to receive a disconnection notification function, or data to OBEX (S) until a certain period of time has passed. Don't give notice, like.

Next, when the LMP (P) of the transmitter receives the data transmission request function from the SMP (S), the LMP header is attached to the data in the function to create data, and LAP (P Issues a data transmission request function containing the data in

On the other hand, when the LMP (S) of the receiver receives the data notification function also for the LAP (S) power, it creates data in which the LMP header is removed from the data in the function, and SMP (S) Issues a data notification function containing the data in.

[0744] It is not necessary to use LMP when making one-to-one connection. in this case,

The LMP header contains an LSAP with a connectionless value.

[0745] When the LAP (P) of the transmitter receives the LMP (P) power as well as the data transmission request function, the LAP header is attached to the data in the function to create data, and the data is input to the physical layer Emits a UI frame.

On the other hand, when the LAP (S) of the receiver receives the data reception notification from the physical layer, it creates data obtained by removing the LAP header from the data of the UI frame, and generates the data in the LMP (S). Issue a data notification function containing the data. In the present embodiment, the LAP header includes a connection address and a UI indicator.

[0747] (3— 3) Disconnection Sequence

[A] With response

FIG. 80 is a sequence diagram showing a disconnection sequence of the present embodiment (with response). FIGS. 81 (a) and 81 (b) are explanatory diagrams showing the data structure of communication data in the disconnection sequence of the present embodiment (with response).

As shown in FIG. 80, in the present embodiment (response is sent), a disconnection command of the transmitter is transmitted to the lower layer, and a DISC command is generated. The receiver receives the DISC command and notifies the upper layer, and the response is returned and a UA response is generated. After that, the upper layer of the transmitter is notified that the UA response has been received, and the process ends.

[0749] The sequence in the transmitter and the receiver at this time is as follows.

[0750] First, each communication layer of the transmitter will be described.

[0751] OBEX (P) immediately sends a disconnection request command to the lower layer (S MP (P)) in the data and issues a disconnection request function (Primitive) when an application disconnect request is received. Produce. Also, when OBEX (P) receives a disconnection confirmation function from SMP (P), it confirms the response of OBEX disconnection from the data, and if it is a response that there is no problem (Success), the disconnection is completed. I assume.

[0755] SMP (P) receives the disconnection request function from OBEX (P) and immediately needs the data of OBEX (P) disconnection request function to communicate with the receiver SMP (S). Add a parameter to generate a disconnection request function for the lower layer (LMP (P)). Also, when SMP (P) receives the disconnection confirmation function from LMP (P), it extracts the parameters generated by the data source of the function's data receiver SMP (S), confirms the value, and End the disconnection process with In addition, SMP (P) also transmits data of the disconnection confirmation function from which the parameters of SMP (S) have been removed as a disconnection confirmation function to OBEX (P). However, normally, there are no parameters newly added by SMP (P) at disconnection.

[0753] The LMP (P) receives the SMP (P) power disconnection request function, and immediately transmits the data of the SMP (P) disconnection request function to the data required for communication with the receiver LMP (S). Add Generate a disconnection request function to the lower layer (LAP (P)). In addition, when LMP (P) receives a disconnection confirmation function from LAP (P), it extracts the nolometer generated by LMP (S) of the receiver from the data of the function, confirms the value, and End the disconnection process with Also, LM P (P) transmits the data strength of the disconnection confirmation function as well as the data from which the parameter of LMP (S) is removed as the disconnection confirmation function to SMP (P). However, there is usually no new parameter added in LMP (P) at disconnection.

[0754] The LAP (P) receives the LMP (P) power disconnection request function, and promptly transmits the LMP (P) disconnection request function data to the receiver, and the parameters necessary for communication with the LAP (S). And output a DISC command to the physical layer of the receiver. When the LAP (P) receives the physical layer strength UA response of the receiver, it extracts the parameter generated by the LAP (S) of the receiver from the data of the UA response, confirms the value, and Close the connection with). Also, LAP (P) issues data obtained by removing the parameter of LAP (S) from the data of UA response as a disconnection confirmation function to LMP (P). However, normally, there are no parameters newly added in LAP (P) at disconnection.

[0755] Next, each communication layer of the receiver will be described.

[0756] When OBEX (S) receives a lower layer (SMP (S)) power or a disconnection notification function (Indication), it checks the intermediate power OBEX disconnection command of the data, and if there is no problem, the response named Success is detected. Is output to SMP (S) as a disconnection response function (Response), and disconnection is completed.

[0757] The SMP (S) extracts the parameter generated by the transmitter SMP (P) from the data of the function when the lower layer (SMP (S)) force also receives the disconnection notification function, Create a response parameter, remove the SMP (P) parameter from the data of the above function, issue a disconnection request function containing the data to OBEX (S), and then disconnect response function from OBEX (S) Wait for When SMP (S) receives the disconnection response function from OBEX (S), it adds the parameter of the response to the data of the disconnection response function of OBEX (S) to LMP (S), Generate a disconnection response function for L MP (S) and terminate the SMP layer disconnection process. However, normally, there is no new parameter to add in SMP (S) at disconnection.

[0758] LMP (S) is the data of the function when lower layer (LAP (S)) power is also subjected to the disconnection notification function The parameter generated by LMP (P) of the transmitter is extracted from the parameter, the parameter of the response is created, the parameter of data power LMP (P) of the above function is removed, and the disconnection request function containing the data is stored. After issuing to SMP (S), wait for disconnection response function from SMP (S). When LMP (S) receives the disconnection response function from SMP (S), it adds the above-mentioned response parameter to the data of the disconnection response function of SMP (S) for LAP (S). , Generates a disconnection response function for LAP (S), and terminates the disconnection process of the LMP layer. However, there is usually no new parameter added in LMP (S) at disconnection!

[0759] When the LAP (S) receives the physical layer strength DISC command, it extracts the parameter generated by the LAP (P) of the transmitter from the data of the DISC command, and the data strength of the DISC command is also L AP (P) After issuing a disconnection request function containing the data to LMP (S), create a response parameter to it and wait for the disconnection response function from LMP (S). Also, when LAP (S) receives the disconnection response function from LMP (S), the parameter of the response is added to the data of LMP (S) disconnection response function, and Output the LAP layer cutting process. However, normally, there are no new parameters added to LAP (S) at disconnection.

[0760] [B] No response

FIG. 82 is a sequence diagram showing a disconnection sequence of the present embodiment (no response). Further, FIG. 81 (a) is an explanatory view showing a data structure of communication data in the disconnection sequence of this embodiment (no response).

[0761] As shown in FIG. 82, in the present embodiment (without response), the disconnection command of the transmitter is transmitted to the lower layer, and the DISC command is generated. The transmitter ends the disconnection process at this point. On the other hand, the receiver receives the DISC command and transmits it to the upper layer, and the disconnection process ends when the upper layer is notified.

The sequence in the transmitter and the receiver at this time is as follows.

First, each communication layer of the transmitter will be described.

[0764] When OBEX (P) receives an application power disconnection request, it immediately enters a disconnection request command to the lower layer (S MP (P)) and issues a disconnection request function (Primitive). Produce. In addition, OBEX (P) is completely disconnected when it receives a disconnection confirmation function from SMP (P). I will finish.

[0765] The SMP (P) receives the disconnection request function from the OBEX (P) and promptly transmits the data of the OBEX (P) disconnection request function to the communication with the receiver SMP (S). Add a parameter to generate a disconnection request function for the lower layer (LMP (P)). Also, when SMP (P) receives the disconnection confirmation function from LMP (P), it terminates the disconnection process of the SMP layer, assuming that it has been disconnected by the transmitted parameter. Also, SMP (P) sends a disconnection confirmation function to OBEX (P). However, normally, there is no new parameter added by SMP (P) at the time of disconnection.

[0766] The LMP (P) receives the SMP (P) power disconnection request function, and immediately transmits the data of the SMP (P) disconnection request function to the data necessary for communication with the receiver LMP (S). To generate a disconnection request function for the lower layer (LAP (P)). Also, when LMP (P) receives the LAP (P) cutting confirmation function, it concludes that the LMP layer has been disconnected, assuming that it has been disconnected by the transmitted parameters. LMP (P) also sends a disconnection confirmation function to SMP (P). However, normally, there is no new parameter added by LMP (P) at the time of disconnection.

[0767] The LAP (P) receives the LMP (P) power disconnection request function, and promptly transmits the LMP (P) disconnection request function data to the receiver. The parameters necessary for communication with the LAP (S) And output a DISC command to the physical layer of the receiver. In addition, when LAP (P) outputs the DISC command, it concludes that the LAP layer disconnection processing is concluded, because it can be disconnected by the transmitted parameters. Also, LAP (P) issues a disconnection confirmation function to LMP (P). However, there is usually no new parameter to add in LAP (P) at disconnection.

[0768] Next, each communication layer of the receiver will be described.

[0769] If OBEX (S) receives a lower layer (SMP (S)) force and also a disconnection notification function (Indication), it checks the medium power OBEX disconnection command of the data, and if there is no problem, the disconnection is completed. It will

[0770] When SMP (S) receives the lower layer (SMP (S)) power disconnection notification function, it extracts the parameter generated by the transmitter SMP (P) from the data of the function, and uses that parameter And complete the disconnection. In addition, SMP (S) issues a disconnection request function to OBEX (S) in which the data strength of the above function is also data excluding the parameter of SMP (P). However, there is usually no new parameter added in SMP (S) when disconnected! When LMP (S) receives the lower layer (LAP (S)) cut notification function, it extracts the parameter generated by LMP (P) of the transmitter from the data of the function, and extracts that parameter Use to complete the disconnect. In addition, LMP (S) issues a disconnection request function to SMP (S) including data in which the data strength of the above function is also removed from the parameters of LMP (P). However, there is usually no new parameter added in LMP (S) at disconnection!

[0772] When the LAP (S) receives the physical layer strength DISC command, it extracts the parameter generated by the LAP (P) of the transmitter from the data of the DISC command, and uses this parameter to complete the disconnection. . Also, LAP (S) issues a disconnection request function to LMP (S) in which data obtained by removing the parameter of LAP (P) from the data of DISC command is inserted. However, there is usually no new parameter added to LAP (S) at disconnection.

[0773] (4) Switching of presence / absence of response

The flow of data and parameters between the transmitter and receiver communication layers will be described with reference to FIGS. 83-90.

[0774] In the present embodiment, the communication layers LAP, LMP, SMP, and OBEX of the transmitter and the receiver have a connection request function, a connection notification function, a connection response function, and a connection confirmation function. These functions are functions for accessing the LAP layer from the upper layer (ie, the LMP layer).

[0775] The above function can specify Data (hereinafter referred to as data) and Requested-Qos or Returned-QoS as arguments. The above data is set in each communication layer as described above.

[0776] On the other hand, Qos notifies the upper layer including the OBEX to the specification of negotiation parameters such as the baud rate determined by the LAP and the negotiation result. Qos is also used in conventional IrDA.

[0777] For example, if a transmitter application or an OBEX (P) force response is required and a QoS including a parameter of Z unnecessary is issued, it is transmitted to the lower layer in order to the LAP (P). Then, the LAP (P) reflects the QoS value as the negotiation parameter (Ack Less Connect) value, and transmits it to the receiver.

[0778] As a result, each communication layer of the transmitter and the receiver corresponds to the transmitter application or Response by OBEX (P) Since it operates according to the specification of Z-less, it is possible to connect in both directions and one direction.

FIGS. 83 to 87 are explanatory diagrams showing flows of data and parameters between communication layers in the connection sequence (FIG. 74) of the present embodiment (with response). The parameters of QoS between OBEX-SMP, SMP-LMP, and LMP-LAP may be identical or different. Therefore, in the figure, -a, -b and -c are added to distinguish.

[0780] In the transmitter, as shown in FIG. 83, the data to be sent to the receiver and the data of QoS-1 (QoS requested by the transmitter) are sent to the receiver using con.req (data) (FIG. 74). Pass from layer to lower layer.

On the other hand, in the receiver, as shown in FIG. 84, only the data of QoS-2 (QoS requested by the receiver) is passed from the upper layer to the lower layer by con. Req.

[0782] After that, when the LAP (S) receives the SNRM command, the receiver compares QoS-1 of the transmitter with QoS-2 of its own device, and QoS-3 is used as a commonly negotiated parameter. create. Then, as shown in FIG. 85, LAP (S) notifies QoS-3 together with data from the transmitter to the upper layer by con.ind (data). Each upper layer stores this QoS-3 and holds it as a connection parameter at connection time.

[0783] In the receiver !, when notifying con.resp (data), the QoS becomes unnecessary! /. Therefore, as shown in Fig. 86, in con.resp (data), only data is passed from the upper layer to the lower layer. Then, when LAP (S) receives con.resp (data), it enters QoS-3 in the UA response and issues a UA response.

[0784] At the transmitter, the LAP (P) receives the UA response and stores QoS-3 as a negotiated parameter. Then, as shown in FIG. 87, LAP (P) notifies QoS-3 to the upper layer together with the data of the receiver by using con.conKdata). Each communication layer holds this Q S S-3 as a connection parameter in the established connection.

In this embodiment, for example, as QoS of con.req, Requested-QoS: Baud-Rate + Max-Turn-Around-Time + Disconnect-Threshold + Databize + Ack less connection + Min-Packet- Interval Use In addition, Con. Ind, con. Conf 0 as ", Resultant-oS: Baua-Rate + Disconnect-Threshold + DataSize + Ack less connection (indication primitive only). Further, in the case of the connection sequence (FIG. 76) of the present embodiment (no response), the flow of data and parameters between communication layers is as follows.

[0787] In the transmitter, as shown in FIG. 83, using the con.req (data) (FIG. 76), the Data transmitted to the receiver and the data of QoS-1 (QoS requested by the transmitter) are upper Pass from layer to lower layer.

[0788] Then, the LAP (P) of the transmitter stores QoS-1 as QoS-3 as it is. And LA

P (P) notifies QoS-3 to the upper layer by con.conf as shown in Figure 87. Each communication layer holds this QoS-3 as a connection parameter in the established connection.

[0790] Thereafter, at the receiver, when the LAP (S) receives the SNRM command, the transmitter QoS-

Set 1 to QoS-3. In addition, the parameters of QoS-2 are not satisfied in combination with QoS-1, and can not be received.

[0791] Subsequently, as shown in FIG. 85, LAP (S) notifies QoS-3 and the data from the transmitter to the upper layer by con.ind (data). Each upper layer stores this QoS-3 and holds it as a connection parameter at connection time.

[0792] Thus, the application can use the above QoS-1 and QoS-2 as the upper layer with or without the response.

(Application) It is possible to switch by operating.

Here, the file format of the file to be transmitted, the application, the selection of the user, and the like can be considered as the criteria for switching the presence / absence of response.

[0794] Specifically, when the file format is used as a reference, for example, in the case of a multimedia related file, both presence / absence of response can be selected, and the file is a phonebook, mail, schedule, etc. and data is received. If you want to confirm that it has been done, you may choose to have a response automatically. Also, when using an application as a reference, for example, in the case of a slide show, no response may be automatically selected. Also, if the user's selection is made, for example, the user may be made to select from a menu display with / without response.

[0795] FIG. 88 to FIG. 90 are explanatory diagrams showing a modification of the flow of data and parameters between communication layers in the connection sequence of the present embodiment. When the first SNRM command includes information on all communication layers in the transmitter (Fig. 74), data and parameters are relayed and transmitted in each communication layer (Fig. 83). It can also be configured to pass directly from each communication layer to the LAP layer as shown in Fig. 88.

[0797] On the other hand, as shown in FIG. 89, in the receiver, all data and parameters included in the SNRM command should be extracted and sent directly to the destination communication layers from the LAP layer. I'm sorry.

Further, as shown in FIG. 90, in the transmitter, data and parameters of OBEX (P), SMP (P), LMP (P) are integrated by LMP (P), and further, by LAP (P) The above integrated data and parameters should be configured to generate the SNRM command by adding the parameters of LAP (P).

[0799] As a transmitter (primary station) in each of the above embodiments, for example, a cellular phone, a PDA (Personal Digital Assistants), a digital camera, a personal computer and the like can be mentioned. Also, as the receiver (secondary station), for example, electronic apparatuses such as mobile phones, televisions, recording apparatuses such as AV equipment, DVD recorders, HDD recorders, printers, personal computers, etc. may be mentioned.

[0800] Each block of the transmitter (primary station) or receiver (secondary station) described above may be configured by hardware logic (communication circuit), or an arithmetic processing unit such as a CPU as follows. It may be realized by software using

[0801] That is, the above-mentioned transmitter or receiver executes a control program instruction for realizing each function, CPU (central processing unit), ROM (read only memory) storing the above program, A storage device (recording medium) such as a random access memory (RAM) to be displayed, a memory for storing various data, and a memory (recording medium) are provided.

[0802] Then, the object of the present invention is to make a computer readable program code (executable program, intermediate code program, source program) of a communication program of a transmitter or a receiver that is software that realizes the functions described above. This can also be achieved by supplying the recorded recording medium to the transmitter or the receiver, and the computer (or CPU or MPU) recording the recording medium on the recording medium and reading out and executing the program code. Ru.

[0803] Examples of the recording medium include tape systems such as magnetic tape and cassette tape, magnetic disks such as floppy (registered trademark) disk Z hard disk, and optical disks such as CD-ROM ZMOZ MD / DVD / CD-R. A disk system, an IC card (including a memory card), a card system such as a Z optical card, or a semiconductor memory system such as a mask ROMZEPROMZEEPROM Z flash ROM can be used.

[0804] Further, the transmitter or the receiver may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited, and, for example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone network, mobile communication network, satellite A communication network etc. can be used. The present invention can also be realized in the form of a carrier wave or a data signal sequence in which the program code is embodied by electronic transmission.

As described above, the communication device according to the present invention is a communication device for collectively transmitting data without delegating the transmission right according to a communication method in which the number of frames that can be transmitted at one time is not limited. Transmission frame generation means for dividing transmission data to be transmitted collectively to generate a transmission frame, serial number generation means for adding a serial number to the transmission frame, and the final transmission frame of the transmission data for collective transmission A batch transmission final flag generation unit that sets a batch transmission final flag indicating that it is a final transmission frame, and a transmission unit that transmits the above-described transmission frame are characterized.

[0806] Further, the communication method according to the present invention is a communication method for collectively transmitting data without delegating transmission right according to a communication method in which the number of frames that can be transmitted at one time is not limited. Batch transmission data is divided to generate a transmission frame, and a serial number is assigned to the transmission frame, and the final transmission frame of the batch transmission data is a batch to indicate that it is the final transmission frame of the batch transmission data. It is characterized in that the transmission final flag is set and the transmission frame is transmitted! /.

[0807] Furthermore, the communication device according to the present invention is not limited to the received frame analysis means for extracting the received frame strength no-error flag and the serial number, and the above-mentioned no-error flag. It is characterized by comprising: no error flag analysis means for determining presence / absence of error, and control means for retransmitting a transmission frame corresponding to the serial number when the error absence flag indicates presence / absence of error. .

[0808] Further, the communication device according to the present invention is a communication device that collectively receives data without transfer of the transmission right according to a communication method in which the number of frames that can be transmitted at one time is not limited. The serial number analysis means for analyzing the serial number included in the serial number to determine whether or not the serial number error is present, and the batch transmission final flag included in the received frame. The received frame is divided into a plurality of transmitted frames by the transmitter. When an error is detected in the received frame received so far by the serial number analysis means when it is indicated that it is the final transmission frame of the batch transmission data transmitted in a batch, it indicates that there is an error. Transmission frame generation means for generating a transmission frame including an error free flag set in the frame and a serial number upon occurrence of an error; Is characterized by comprising a transmitting means for sending the frame.

[0809] The communication method according to the present invention is a communication method for collectively receiving data without transfer of transmission right according to a communication method in which the number of frames that can be transmitted at one time is not limited. The serial number included in the frame is analyzed to determine whether or not there is an error in the serial number, and the batch transmission final flag included in the received frame is divided into a plurality of transmission frames by the transmitter and the batch transmission is performed. No error flag set to indicate that there is an error and an error occurs if an error is detected in the previously received frame when it indicates that it is the last transmission frame of the batch transmission data that has been sent. A transmission frame including a serial number is generated, and the transmission frame is transmitted.

[0810] Further, the communication system according to the present invention is characterized by including the communication device as the transmitter and the communication device as the receiver. / Scold.

[0811] With the above configuration and method, according to a communication method in which there is no limit on the number of frames that can be transmitted at one time, the transmitter transmits batch transmission data in batch transmission of data without delegating transmission right. The transmission frame is divided to generate a transmission frame, and a serial number is assigned to the transmission frame. Furthermore, in the final transmission frame of the batch transmission data, the final transmission frame of the batch transmission data The transmission frame is transmitted by setting the batch transmission final flag indicating that the frame is a transmission frame. On the other hand, in the receiver, the serial number included in the received frame is analyzed to determine whether there is an error in the serial number, and if an error is detected in the received frame, the no error flag set to indicate that there is an error and Generate a transmission frame including the serial number at the time of error occurrence and transmit it to the transmitter. Then, when the transmitter receives a frame including a serial number at the time of occurrence of an error from the receiver, the transmitter retransmits a transmission frame corresponding to the serial number.

[0812] Here, until the receiver finds that the transmitter has received the final transmission frame of the transmission frames into which the batch transmission data has been divided, according to the batch transmission final flag included in the reception frame, The transmission frame including the serial number when the error occurs is not transmitted. That is, error notification is performed in batch transmission data units.

[0813] Therefore, even if a communication method without limitation on the number of frames (window size) that can be transmitted or received at one time is used, frame omission etc. can be detected and retransmitted, so it is highly reliable. It is possible to communicate. In addition, since error notification is performed in batch transmission data units, data transfer efficiency is high.

Furthermore, in the communication device according to the present invention, when one transmission data is divided into a plurality of batch transmission data and transmitted, the final transmission frame of the transmission data is transmitted in the final transmission frame of the transmission data. And a data final flag generation unit configured to set a data final flag indicating that

According to the above configuration, it is possible to further inform the receiver of the end of transmission data. Therefore, in the receiver, for example, it becomes possible to start processing of the data in the reception buffer efficiently.

[0816] Furthermore, in the communication device according to the present invention, the communication method is IrLAP (Infrared Link Access).

It is characterized in that it is communication using a UI (Unnumbered Information) frame of Protocol).

According to the above configuration, the UI frame of IrLAP can be used as a communication method without limitation of the number of frames (window size) that can be transmitted or received at one time. That is, it becomes possible to perform retransmission using the UI frame of IrLAP. [0818] Further, the communication device according to the present invention is characterized in that the transmission frame includes at least a part of a final PUT command of OBEX (Object Exclusion Protocol) or a non-final PUT command. ! /.

According to the above configuration, it is possible to perform retransmission with high quality and high transfer efficiency by using the OBEXPUT command.

[0820] Furthermore, the communication device according to the present invention is characterized in that the transmission frame includes a part or all of a SUCCESS response of Object Exchange Protocol (OBEX).

According to the above configuration, when data is transferred from the transmitter using the OBEX Put command, it is possible to transmit the SUCCESS response of the OBEX, and communication using the OBEX Put operation is possible. Become.

Further, the communication device according to the present invention is a communication device for collectively receiving data without being transferred to the transmission right according to a communication method in which the number of frames that can be transmitted at one time is not limited. An error detection unit for determining whether or not there is an error in the frame, a batch transmission final flag included in the received frame, the batch in which the received frame is divided into a plurality of transmission frames by the transmitter and batch transmitted. When it is indicated that it is the final transmission frame of transmission data, the error detection means indicates the presence or absence of an error depending on whether or not the error has been detected in the reception frame received so far. A transmission frame generation means for generating a transmission frame including the error-free flag set as described above; and a transmission means for transmitting the transmission frame. It is characterized.

[0823] According to the above configuration, it is possible to notify the transmitter of the presence or absence of an error.

Therefore, it is possible for the transmitter that received this to perform retransmission.

Therefore, there is no restriction on the number of frames (window size) that can be transmitted or received at one time! ヽ Even if a communication method is used, it is possible to detect missing frames and retransmit, so reliability can be achieved. Communication can be performed. In addition, since error notification is performed in batch transmission data units, data transfer efficiency is high.

[0825] Further, the communication device according to the present invention is a communication device that transmits an object using the object exchange protocol OBEX (0 Bject EXc hange protocol), and the OBEX command It is characterized by comprising an OBEX layer processing unit that transmits the next OBEX command that does not receive an OBEX response from the receiver after transmitting the

[0826] The communication method according to the present invention is a communication method for transmitting an object using an object exchange protocol OBEX (OBject EXchange protocol), and, after transmitting an OBEX command, an OBEX from the receiver. It is characterized by sending the following OBEX command which does not receive a response.

According to the above configuration and method, the transmitter can transmit the next OBEX command without receiving the OBEX response from the receiver. Therefore, even if the receiver does not transmit a response command to the request command from the transmitter, or if the receiver does not have the transmission function, it becomes possible to transfer the object by means of OBEX. That is, one-way communication using OBEX can be realized.

Further, the communication device according to the present invention is a communication device that transmits an object using an object exchange protocol OBEX (OBject EXchange protocol), and transmits a! /, Put command at the end of OBEX. Only afterward, it is characterized by including an OBE X layer processing unit that transmits a Put command or a Put command at the end of the next OBEX without receiving an OBEX response from the receiver.

[0829] The communication method according to the present invention is a communication method for transmitting an object using the object exchange protocol OBEX (OBject EXchange protocol), and transmits the! /, Put command at the end of OBEX. Only after that, without receiving an OBEX response from the receiver, it is characterized in that it sends a Put command or a Final Put command at the end of the next OBEX.

According to the above configuration and method, efficient data transfer can be realized by omitting a response of a non-final Put command (CONTIN UE response command).

[0831] The communication device according to the present invention is a communication device that receives an object such as a transmitter device using an object exchange protocol OBEX (OBject EXchange protocol), and after receiving an OBEX command, the OBEX It is characterized by being equipped with an OBEX layer processing unit that does not always send a response. Further, a communication method according to the present invention is a communication method for receiving a transmitter device using an object exchange protocol OBEX (OBject EXchange protocol), and an OBEX response after receiving an OBEX command. It is characterized by not always transmitting.

[0833] According to the above configuration and method, in the case where the transmitter can transmit the next OBEX command without receiving the OBEX response from the receiver, in the receiver, an unnecessary response command may be transmitted. It is possible to perform control without generation and transmission. Thus, one-way communication using OBEX can be realized.

Further, the communication device according to the present invention is a communication device that receives an object such as a transmitter device using an object exchange protocol OBEX (OBject EXchange protocol), and receives a Put command that is not the end of OBEX. Sometimes, it is characterized by including an OBEX layer processing unit that transmits an OBEX response when the final Put command is received without transmitting the OBEX response.

[0835] The communication method according to the present invention is a communication method for receiving a transmitter device using an object exchange protocol OBEX (OBject EXchange protocol), and receiving a Put command that is not the final of OBEX. , When sending the final Put command without sending the OBEX response, it is characterized by sending the OBEX response! /,

[0836] According to the above configuration and method, efficient data transfer can be realized by omitting the response of the non-final Put command (CONTIN UE response command).

In this case, the communication device may be realized by a computer. In this case, communication of the communication device which causes the communication device to be realized by the computer by operating the computer as each part of the communication device. The program and a computer readable recording medium recording the same also fall within the scope of the present invention.

[0838] Further, the communication device may be realized by a communication circuit that functions as the above-described units.

[0839] Further, the communication device is suitable for a mobile phone that performs communication by the communication device. According to the above mobile phone, it is possible to communicate with quality and Z, with high transfer efficiency. It becomes.

[0840] Further, the communication device is suitable for a display device that displays based on data received by the communication device. According to such a display device, communication can be performed with high quality and high Z or transfer efficiency.

[0841] Further, the above-mentioned communication device is suitable for a printing device that prints based on data received by the communication device. According to such a printing apparatus, communication can be performed with high quality and high Z or transfer efficiency.

[0842] Further, the communication device is suitable for a recording device for recording data received by the communication device. According to such a recording apparatus, communication with high quality and Z or transfer efficiency can be performed.

Further, the present invention may be configured as follows.

[0844] [Primary station]

(1. Primary station sends serial number and BL flag to UI frame in LAP layer and sends it) The communication device [1] according to the present invention is limited in window size (number of frames that can be sent or received at one time). A communication device that transmits data of a certain size in a batch without delegating transmission rights using a non-communication method, including a serial number in a transmission frame, a flag indicating the end of batch transmission data, and transmission data And a circuit for generating a transmission frame, and the circuit for transmitting a transmission frame, and at the time of data transfer, the flag indicating the end of batch transmission data indicates a value indicating the end of data. It is characterized in that the serial number is increased or decreased by a predetermined value until it is set and transmitted.

[0845] According to the above configuration, even if there is no restriction on the window size, the communication device that has received the above frame can detect a missing frame even when using a communication method, and communication can be performed with high reliability. It will be possible to do.

[0846] (2. Retransmission of all secondary powers when requested)

The communication device [2] according to the present invention is characterized in that, in the above-mentioned communication device [1], when the error free flag in the frame received from the opposite station indicates that there is an error, the data is retransmitted from the beginning. Do.

[0847] According to the above configuration, if the opposite station has made a retransmission request due to an error, retransmission is performed. It will be possible to do.

[0848] (3. Change serial number from 0 when all retransmissions)

The communication device [3] according to the present invention is characterized in that the serial number is set to an initial value according to a predetermined rule at the time of the first frame transmission at the time of the retransmission in the communication device [2].

[0849] According to the above configuration, it is possible for the communication device that has received this to know that retransmission has been performed from the beginning.

[0850] (4. All retransmissions are only once)

The communication device [4] according to the present invention is characterized in that, in the communication device [2], the retransmission is performed only once.

According to the above configuration, it is possible to reduce power consumption by retransmission when the quality of the communication path is poor.

[0852] (5. Make a limit on the number of all retransmissions)

The communication device [5] according to the present invention is characterized in that, in the communication device [2], the retransmission is equal to or less than a predetermined value.

According to the above configuration, it is possible to change the limit of the number of retransmissions according to the quality of the communication path, and it is possible to perform power consumption reduction with higher efficiency.

[0854] (6. Retransmission from the serial number requested to be retransmitted from the secondary station)

In the communication device [6] according to the present invention, in the communication device [1], when the no-error flag in the frame received from the opposite station indicates that there is an error, among the frames transmitted so far, It is characterized in that retransmission is performed from the frame corresponding to the serial number in the received frame.

According to the above configuration, retransmission of the serial number power requested from the opposite station becomes possible, and the transfer efficiency at error becomes high.

[0856] (7. Retransmission from serial number requested to be retransmitted from secondary station (serial number is also returned))

The communication device [7] according to the present invention is characterized in that, in the above-mentioned communication device [6], the serial number is the serial number in the frame received immediately before transmitting the first frame when the retransmission is performed. [0857] According to the above configuration, it is possible for the opposite station to know the retransmission start point of data.

[0858] (8. Retransmission from serial number designated by secondary station only once)

The communication device [8] according to the present invention is characterized in that, in the communication device [6], the retransmission is performed only once.

[0860] (9. A limit is imposed on the number of retransmissions from the serial number designated by the secondary station)

The communication device [9] according to the present invention is characterized in that, in the communication device [6], the retransmission is equal to or less than a predetermined value.

According to the above configuration, it is possible to change the limit of the number of retransmissions according to the quality of the communication path, and it is possible to carry out more efficient reduction of power consumption.

[0862] (10. If there is no resending request for the secondary power, the serial number is increased and sent)

In the communication device [10] according to the present invention, in the communication device [1], when the no error flag in the frame received from the opposite station indicates no error, the serial number of the previously transmitted frame is used. It is characterized in that a value increased by a predetermined value is assigned as a serial number and transmission is performed.

According to the above configuration, when there is no retransmission request from the opposite station, it becomes possible to continue to transmit data.

[0864] (11. The unit of data size with BL = 1 is determined by the buffer size on the receiving side)

The communication device [11] according to the present invention holds the batch receivable data size of the opposite station received from the opposite station at the time of connection in the communication device [1], and transmits data in the transmission frame. A flag indicating the end of the batch transmission data is set as a value representing the end of the data, and is transmitted, with a total of 以下 being less than the data size received by the opposing station at the time of connection.

According to the above configuration, it is possible to prevent an overrun error from occurring in a situation where the buffer on the receiving side overflows.

[0866] (12. If the block size parameter is not received, the default value will be the block size) In the communication device [12] according to the present invention, when the communication device [11] does not receive the batch receivable data size of the opposite station from the opposite station at the time of connection, the predetermined range is less than a predetermined value. It is characterized in that a flag indicating the end of transmission data is set as a value indicating the end of data and transmitted.

[0867] According to the above configuration, if a default value is defined between the opposite station and the opposite station, if the opposite station can communicate with the default value, the reception buffer is set to the opposite station at the time of connection. Need not be notified.

[0868] (13. After the primary station transmits as BL = 1, when the time out times out, transmit the previous transmission frame again)

The communication device [13] according to the present invention particularly has a timer in the communication device [1], and the flag indicating the end of batch transmission data is set as the meaning of the end of data to transmit a frame in advance, It is characterized in that, when the opposing station also does not receive a frame for a predetermined time, only the frame transmitted immediately before is retransmitted.

According to the above configuration, when an error occurs in a frame including a flag indicating the end of batch transmission data and reception can not be normally performed by the opposite station, retransmission is possible.

[0870] (14. The primary station retransmits a BL = 1 frame only once)

The communication device [14] according to the present invention is characterized in that, in the communication device [13], the retransmission is performed only once.

[0872] (15. There is a limit for the primary station to resend a frame with BL = 1)

The communication device [15] according to the present invention is characterized in that, in the communication device [13], the number of retransmissions is equal to or less than a predetermined number of times.

[0874] (16. The primary station sets BL = 1 when transmitting all frames)

The communication device [16] according to the present invention, in the communication device [1], sets a flag indicating the end of the batch transmission data to a value indicating the end of the data in all the transmission frames. Setting and sending.

According to the above configuration, it is possible to reduce the size of the transmission buffer required for retransmission.

[0876] (17. The primary station sets a flag indicating the end of data from the upper layer)

The communication device [17] according to the present invention, in the communication device [1], particularly has a circuit for setting a flag indicating the end of transmission data of its own station, and transmits the end of its transmission data. In this case, a flag indicating the end of the transmission data of the own station is set to a value that means the end of the data, and transmission is performed.

[0877] According to the above configuration, the opposite station can know the end of transmission data.

[0878] (18. The primary station performs bi-directional communication with the IrDA UI frame)

In the communication device [18] according to the present invention, in any one of the communication devices [1] to [17], the communication method without limitation of the window size is a UI frame of IrLAP (Infrared Link Access Protocol). It is characterized by the communication used.

[0879] According to the above configuration, retransmission can be performed using the UI frame of IrLAP.

[0880] (19. The primary station transmits the LAP layer UI frame with serial number in one-way transmission)

The communication device [19] according to the present invention uses the UI frame of IrLAP (Infrared Link Access Protocol) to perform communication without requiring a response from the opposite station. , And the circuit for transmitting the transmission frame, and at the time of data transfer, the serial number is increased or decreased by a predetermined value, .

According to the above configuration, it is possible to detect whether or not there is a dropout in a received frame in one-way communication using the UI frame of IrDA, which leads to improvement in communication quality.

[0882] (20. The primary station transmits a serial number to the UI frame in one-way communication with the DL flag attached)

The communication device [20] according to the present invention, in the communication device [19], has a circuit that generates a flag that particularly indicates the end of transmission data, and sets and transmits a flag that indicates the end of the transmission data. It is characterized by According to the above configuration, it is possible to perform desired processing when the receiving side receives the flag indicating the end of the transmission data.

[0884] (21. The data transmitted by the primary station is the OBEX PUT command)

The communication device [21] according to the present invention is located in any one of the communication devices [1] to [20], and the transmission data includes the Put (Final or not Final) of Object Exchange Protocol (OBEX). ) Characterized in that part or all of the command is included.

[0885] According to the above configuration, communication using the Put command of OBEX becomes possible.

[0886] [Secondary station]

(22. When the secondary station receives a frame of BL = 1, it notifies the primary station of the presence or absence of an error) The communication device [22] according to the present invention has a window size (the number of frames that can be transmitted or received at one time). An error detection circuit that determines whether there is no error in received frames or not, which is a communication device that batch-receives data of a certain size without transfering transmission rights using a communication method that does not have limitations. A circuit for storing data in the reception frame in the reception buffer, a circuit for processing the data in the reception buffer, a circuit for determining the flag indicating the end of batch transmission data, and a no error flag are provided. The circuit has a circuit for generating a transmission frame and a circuit for transmitting the transmission frame, and at the time of data transfer, a flag indicating the end of the batch transmission data in the reception frame is the end of data. If no error is detected in the frame received so far, meaning no error, the no error flag means no error, and if an error is detected, the no error flag It is characterized in that a frame is generated and transmitted with an error meaning.

According to the above configuration, it is possible to notify the opposite station of the presence or absence of an error.

The opposite station that has received this can perform retransmission.

[0888] (23. When the secondary station receives a frame with BL = 1, notify the primary station of the presence or absence of an error and the serial number at the time of the error)

The communication device [23] according to the present invention uses a communication method in which there is no restriction on the window size (the number of frames that can be transmitted or received at one time), so that data of a certain size can not be transferred. , Communication devices that receive at once, and there are no errors in received frames Power error detection circuit, circuit for calculating serial number to be received, circuit for comparing serial number to be received with serial number of received frame, circuit for storing data in received frame in reception buffer There is a circuit that processes data in the reception buffer, a circuit that holds the serial number of the frame in which an error is detected, a circuit that determines a flag that indicates the end of batch transmission data, a no error flag, and an error. In this case, it has a circuit that assigns a serial number when an error occurs and generates a transmission frame, and a circuit that transmits the transmission frame, and at the time of data transfer, the end of the batch transmission data in the reception frame. In the frame received so far, when the flag indicating the end of data indicates the end of the data, the error detection circuit If no error is detected in the serial number comparison circuit, the no error flag means no error, and if an error is detected, the no error flag means no error. 1 It is characterized in that the serial number of the frame in which the second error is detected is sent together.

With the above configuration, it is possible to notify the opposite station of the presence or absence of an error.

In addition, it becomes possible to notify of the serial number desired to be retransmitted, and it becomes possible to carry out efficient retransmission.

[0890] (24. The secondary station does not process the data in the received frame when receiving a frame after error detection)

In the communication device [24] according to the present invention, in the communication device [22] or [23], when an error is detected by the error detection circuit and the serial number comparison circuit, at least the batch transmission data It is characterized in that the data in the received frame is not stored in the reception buffer until the frame is received with the flag indicating the end indicating the end of the data.

According to the above configuration, when an error occurs, it is possible to reduce the consumption of power for data processing until a retransmission request is made to the opposite station.

25. (The secondary station makes a retransmission request only once)

In the communication device [25] according to the present invention, in the communication device [22] or [23], an error is detected in the received frame in the error detection circuit and the serial number comparison circuit. In this case, it is characterized in that the no-error flag is transmitted only once as the meaning of the presence of an error.

[0894] (26. A restriction is imposed on the secondary station to make a retransmission request)

In the communication device [26] according to the present invention, in the communication device [22] or [23], when an error is detected in the received frame in the error detection circuit and the serial number comparison circuit, the error free flag is It is characterized in that the number of times of error transmission is less than a predetermined number of times.

[0896] (27. The secondary station always requests retransmission from 0)

In the communication device [27] according to the present invention, when performing transmission with the error-free flag in the meaning of presence of an error in the communication device [23], the serial number is always taken as the initial value in a predetermined rule. It is characterized by setting and transmitting.

According to the above configuration, the first power retransmission of data is always requested when an error is detected, and there is no need to manage the serial number of the frame in which the error occurred.

Leads to a simplified circuit.

[2898] (Secondary station notifies buffer size to primary station at connection)

The communication device [28] according to the present invention is characterized in that, at the time of connection, the communication device [22] or [23] adds a noffer size of its own station to a frame and transmits it.

[0899] According to the above configuration, it is possible to notify the opposite station of the reception buffer size of the own station, and adjusting the data size to be transmitted collectively by the opposite station overflows the reception buffer of the own station. It becomes possible to prevent an overrun error.

[0900] (29. The secondary station does not process as an error if it continuously receives frames of the same serial number with BL = 1)

In the communication device [29] according to the present invention, in the communication device [23], the flag indicating the end of the batch transmission data of the received frame means the end of the data, and The serial number comparison circuit does not treat as an error if the serial number at the time is the same as the serial number of the frame indicating the end of the data received, indicating that the flag indicating the end of the batch transmission data received immediately before is the same. It is characterized by

[0901] According to the above configuration, if an error occurs in a frame transmitted by the own station, and the opposing station can not receive normally, the retransmitted opposing station force frame is not processed as an error. Is possible.

[0902] (30. When the secondary station receives a retransmission packet with BL = 1, it does not store intraframe data in the reception buffer)

In the communication device [30] according to the present invention, in the communication device [29], the flag indicating the end of the batch transmission data of the received frame means the end of the data, and the serial number at that time If the flag indicating the end of the batch transmission data received immediately before indicates the end of the data and is the same as the serial number of the frame, the data in the reception frame is not stored in the reception buffer. Do.

[0903] According to the above configuration, when an error occurs in a frame transmitted by the own station and the opposite station can not receive normally, the data in the opposite station power retransmitted frame is received in duplicate. It is possible to prevent saving in the communication buffer.

[0904] (31. When the secondary station receives a retransmission packet with BL = 1, it retransmits the frame transmitted immediately before)

In the communication device [31] according to the present invention, in the communication device [29], the flag indicating the end of the batch transmission data of the received frame means the end of the data, and the serial number at that time is If the flag indicating the end of the batch transmission data received immediately before is the same as the serial number of the frame indicating the end of data, it is characterized in that the frame transmitted immediately before is retransmitted.

[0905] According to the above configuration, when an error occurs in a frame transmitted by the own station and the opposite station can not receive normally, retransmission can be performed.

[0906] (32. When the secondary station receives a frame with DL = 1, notifies that the data in the higher layer of the opposite station has ended)

In the communication device [32] according to the present invention, in the communication device [22] or [23], in particular, It has a circuit that determines a flag indicating the end of data of the opposite station, and in the reception frame, if the flag indicating the end of data of the opposite station indicates the end of data, data processing in the reception buffer of the own station It is characterized by notifying a department of that.

[0907] According to the above configuration, it is possible to notify the end of transmission data of the opposite station to the in-station reception data processing unit.

[0908] (33. When the secondary station receives a frame with DL = 1, transmits data of the upper layer of the secondary station) [0908] The communication device [33] according to the present invention receives the data in the communication device [32]. In the frame, when the flag indicating the end of the data of the opposite station indicates the end of the data, after notifying the data processing unit in the reception buffer of the own station of that fact, Data transmission.

[0909] According to the above configuration, it is possible to transmit response data for received data.

[0910] (34. The data transmitted by the secondary station is SUCCESS in OBEX)

The communication device [34] according to the present invention is the communication device [33], and the data of the own station includes a part or all of SUCCESS responses of OBEX (Object Exchange Protocol)! / Is characterized by.

[0911] According to the above configuration, when data is transferred from the opposite station using the Put command of OBEX, it is possible to transmit a SUCCESS response of OBEX, and communication using Put information of OBEX is possible. It becomes.

[0912] (35. When the secondary station transmits upper layer data, it transmits with no error flag and transmits

)

The communication device [35] according to the present invention is characterized in that the communication device [33] transmits the data without an error together, particularly when transmitting data of the own station.

[0913] According to the above configuration, the frame for notifying the opposite station of no error and the frame for transmitting the response data of the own station can be put together into one, which leads to bandwidth efficiency.

[0914] (36. The secondary station performs two-way communication with the IrDA UI frame)

The communication device [36] according to the present invention is not limited to the above communication devices [22] to [35], and the communication method with no restriction on the window size is IrLAP (Infrared Link Access Prot It is characterized in that the communication is performed using the UI frame of Ocol).

According to the above configuration, retransmission can be performed using a UI frame of IrLAP.

[0916] (37. The secondary station receives data in one-way communication (checks the serial number))

The communication device [37] according to the present invention uses the UI frame of Infrared Link Access Protocol (IrLAP) to determine whether there is an error in the received frame when performing communication without transmitting a response to the opposite station. An error detection circuit for discrimination, a circuit for calculating a serial number to be received, a circuit for comparing a serial number to be received with a serial number of a received frame, a circuit for storing data in a received frame in a reception buffer; The circuit has a circuit for processing data in the receive buffer, and at the time of data transfer, if no error is detected in the error detection circuit and the serial number comparison circuit in the received frame, normal data can be obtained. Desired processing is performed as reception, and when an error is detected, desired processing is performed as data reception failure.

According to the above configuration, even in one-way communication using the UI frame of IrLAP, it is possible to detect frame omission by checking the serial number of the frame.

[0918] (38. The secondary station judges the end of data in the DL analysis circuit in one-way reception) [0918] The communication device [38] according to the present invention is particularly suitable for the opposing station in the communication device [37]. If the flag indicating the end of data of the opposite station indicates the end of data in the reception frame, the data processing unit in the reception buffer of the own station is provided. To that effect.

According to the above configuration, on the receiving side, it is possible to determine the end of received data even when there is no information on the total data length transmitted by the transmitting side in the received frame.

[0920] (39. When the secondary station receives a frame after error detection in one-way reception, it does not process data in the received frame)

In the communication device [39] according to the present invention, in the communication device [37], when an error is detected by the error detection circuit and the serial number comparison circuit, at least a flag indicating the end of the batch transmission data. It is characterized in that the data in the received frame is not stored in the reception buffer until the frame having a value indicating the end of data is received. According to the above configuration, it becomes possible not to perform data storage processing after an error is detected, and power consumption can be reduced.

[0922] (40. Communication circuit)

A communication circuit [40] according to the present invention is characterized in that it is a communication circuit capable of realizing communication of any one of the communication devices [1] to [39].

According to the above configuration, it can be incorporated in other communication devices.

[0924] (41. Program)

The communication program [41] according to the present invention is characterized in that the communication apparatus [1] to [39] is a communication program capable of realizing any one of the communication.

[0926] (42. Recording medium)

A recording medium [42] according to the present invention is characterized in that the communication program [41] is recorded, and is a computer readable recording medium.

According to the above configuration, the present invention can be implemented by expanding a program recorded on the present recording medium on a memory and causing the program to operate.

[0928] (43. Mobile phones)

A mobile phone [43] according to the present invention is characterized by being a mobile phone capable of realizing communication of any one of the communication devices [1] to [39].

According to the above configuration, high-quality communication can be performed by realizing the above-mentioned any one of the above-mentioned communication methods using a mobile phone.

[0930] (44. Display Device)

A display device [44] according to the present invention is characterized in that it is a display device capable of realizing communication of any one of the communication devices [1] to [39].

According to the above configuration, high-quality communication can be performed by realizing the above-mentioned any one of the above communication methods using the display device.

[0932] (45. Printer)

The printing apparatus [45] according to the present invention is characterized in that the communication apparatus [1] to [39] can realize any one of the communications. [0933] According to the above configuration, high-quality communication can be performed by realizing the above-described one of the communication methods using the printing apparatus.

[0934] (46. Recording device)

A recording apparatus [46] according to the present invention is characterized in that the communication apparatus [1] to [39] can realize communication of any one of the communication apparatuses [1] to [39].

[0935] According to the above configuration, high-quality communication can be performed by realizing any of the above-described communication methods using a printing apparatus.

[0936] (47. Communication method without response in the OBEX layer)

Further, another communication method according to the present invention is a communication method of transmitting an object to the opposite station using the object exchange protocol OBEX (OBject Exchange protocol), wherein after transmitting the OBEX command, the OBEX response from the opposite station is transmitted. It is characterized by sending the next OBEX command not to be received.

[0937] (48. A communication method which requires no response only in one-way transmission)

Another communication method according to the present invention is further characterized in that, in the above communication method, in particular, bidirectional communication requiring an OBEX response from the opposite station after transmission of the OBEX command and a piece not requiring an OBEX response from the opposite station. A means for switching direction communication may be provided, and only when the one-way communication is selected, after sending the OBEX command, the next OBEX command may be sent without receiving an OBEX response from the opposite station. .

[0938] (49. A communication device requiring no response in the OBEX layer)

In the communication apparatus according to the present invention, the communication apparatus further includes an OBEX layer processing unit capable of transmitting an object to the opposite station using an object exchange protocol OBEX (OBject Exchange protocol). The layer processing unit is characterized by generating and transmitting an OBEX command, and then generating and transmitting the next OBE X command which does not receive an OBEX response from the opposite station.

[0939] (50. A communication device which does not require a response only at one-way transmission)

Another communication apparatus according to the present invention is a communication apparatus according to the present invention, in particular, a piece which does not require two-way communication requiring an OBEX response from the opposite station after transmitting the OBEX command and an OBEX response from the opposite station. Communication method switching unit that switches direction communication After the OBE X command is generated and transmitted only when the communication method switching unit selects one-way communication, the next OBEX command is generated and transmitted without receiving the OBEX response from the opposite station. Let me do it.

[0940] According to the above method and configuration, for example, in one-way communication using OBEX, the client device side can not receive the server response command to the client device side force request command. Even, you can enable object transmission with OBEX. Also, during bi-directional communication, communication is performed to confirm the response from the server, and during uni-directional communication, communication can be performed without a response from the server, and bi-directional communication and uni-directional communication can be performed by one OBEX. It is possible to realize by a protocol.

[0941] (51. Communication method not requiring response only for Put commands that are not Final)

Further, another communication method according to the present invention is a communication method of transmitting an object to the opposite station using the object exchange protocol OBEX (OBject Exchange protocol), wherein the opposite station is transmitted only after transmitting the last Put command of OBEX. It is characterized by sending the next non-final Put command of OBEX or the final Put command without receiving an OBEX response from.

[0942] (52. A communication device that does not require a response for Put commands that are not Final)

Another communication apparatus according to the present invention is the communication apparatus having an OBEX layer processing unit capable of transmitting an object to the opposite station using the object exchange protocol OBEX (OBject Exchange protocol). In this part, only after generating and sending a non-end OBEX put command, without generating an OBEX response from the opposite station, it is possible to generate and transmit the next OBEX end !, put command or the last put command. It is characterized.

According to the above method and configuration, it is possible to realize object exchange which does not require only the CONTINUE response command to the above-mentioned PUT command.

[0944] (53. Communication method not to transmit a response in the OBEX layer)

Another communication method according to the present invention is a communication method for receiving an opposing station power object using an object exchange protocol OBEX (OBject EX ch ange protocol), in which an OBEX response is always received after receiving an OBEX command from the opposite station. Not to send It is a sign.

[0945] (54. A communication method in which a response is not transmitted in the OBEX layer only during one-way reception)

Further, in the communication method according to the present invention, in the above communication method, in particular, bidirectional communication that requires an OBEX response from the opposite station after transmitting the OB EX command and an OBEX response from the opposite station are not required. It does not always send an OBEX response to the opposite station after receiving the OBEX command only when the one-way communication is selected.

[0946] (55. A communication device that does not send a response in the OBEX layer)

Another communication apparatus according to the present invention is the communication apparatus having an OBE X layer processing unit capable of receiving an object from the opposite station using an object exchange protocol OBEX (OBject Exchange protocol). The processing unit is characterized in that it does not always send an OBEX response after receiving the opposing station's OBE X command.

[0947] (56. A communication device that does not transmit a response in the OBEX layer only when receiving in one direction)

Further, the other communication apparatus according to the present invention does not require, in the above-mentioned communication apparatus, two-way communication requiring an OBEX response from the opposite station, and an OBEX response from the opposite station, particularly after the transmission of the OB EX command. The communication method switching unit may be configured to switch one-way communication, and the OBEX response may not always be transmitted to the opposite station after receiving the OBEX command only when the communication method switching unit selects one-way communication.

[0948] According to the above method and configuration, for example, in one-way communication using OBEX, the client device side does not need to transmit the server device side response command to the client device side force request command. In such a case, it is possible to control not to generate and send unnecessary response commands. In addition, during bidirectional communication, a response command can be sent to the client device to enable confirmation of communication on the client device side. During unidirectional communication, generation of unnecessary response commands to the client device is enabled. And it becomes possible not to transmit, and it becomes possible to realize two-way communication and one-way communication with one OBEX protocol.

[0949] (57. A communication method that does not respond only to Put commands that are not Final)

Another communication method according to the present invention is an object exchange protocol OBEX (OBject). In the communication method that receives an object from the opposite station using Exchange protocol), when receiving a Put command that is not the last of OBEX, do not send an OBEX response, and when receiving a final Put command, send an OBEX response. It is characterized by

[0950] (58. A communication device that does not respond only to a Put command that is not Final)

Another communication apparatus according to the present invention is the communication apparatus having an OBE X layer processing unit capable of receiving an object from the opposite station using an object exchange protocol OBEX (OBject Exchange protocol). The processing unit is characterized in that the OBEX response is not transmitted when receiving the OBEX non-final Put command, and the OBEX response is generated and transmitted when the final Put command is received.

[0951] According to the above method and configuration, it is possible to generate only the CONTINUE response command to the non-final PUT command from the client device side and perform control such as! /! It is possible to improve the efficiency of the bandwidth.

Also, the present invention may be configured as follows! /.

[0953] A communication system according to the present invention is a communication system for dividing communication data into a plurality of non-restricted frames and communicating communication data between the primary station and the secondary station in frame units. The primary station transmits the data by adding the serial number of the frame and a flag indicating whether or not to transfer the transmission right to the non-restricted frame, and the secondary station transmits the frame received from the primary station. When the flag indicating whether to transfer the right means transfer of the transmission right, notification to the primary station of the communication result as to whether an error or missing frame has occurred in the frame received so far It is characterized by doing.

[0954] Examples of the unrestricted frame include a UI (Unnumbered Information) frame used in a communication method based on IrDA communication method, for example, using infrared light. The UI frame can be continuously transmitted without being limited to the number of transmission frames as long as it is within the maximum turnaround time that can be continuously transmitted.

[0955] According to the above configuration, it is possible to retransmit a frame in which an error or a frame drop has occurred even in communication using a non-limit frame having no limitation on the window size. Therefore, communication efficiency can be improved. In addition, when the secondary station detects an error or a frame drop, when notifying the primary station of the communication result, it also notifies the serial number of the frame in which the error or the frame drop has occurred. .

[0957] According to the above configuration, the primary station does not have to retransmit all the frames, so that the overhead of communication can be reduced and the power consumption of the primary station can be reduced.

[0958] Also, when the primary station receives a notification from the secondary station that there is an error or a missing frame, the secondary station may retransmit the frames from the frame for which the error or missing frame was notified. It is characterized by transmitting.

According to the above configuration, since there is no need to retransmit all the frames in the primary station, the overhead of communication can be reduced, and the power consumption of the primary station can be reduced.

[0960] Further, the primary station is characterized in that it retransmits the frame subsequent to the serial number of the frame in which there is an error or a missing frame only once.

According to the above configuration, since the primary station retransmits the frame only once, the power consumption accompanying the transmission can be reduced.

In addition, when the secondary station detects an error or a frame drop, it is characterized by stopping reception processing of frames subsequent to the frame in which the error or frame drop is detected.

According to the above configuration, the secondary station does not receive a frame after detecting an error or a frame drop, thereby reducing power consumption without receiving unnecessary frames. be able to.

Further, the secondary station is characterized in that only the frame having a necessary error or missing frame is received from the frames retransmitted from the primary station.

[0965] According to the above configuration, the secondary station can reduce power consumption without receiving unnecessary frames.

Also, at the time of connection establishment, a frame that can be transmitted and received by each station at one time in each of the connection request frame transmitted from the primary station and the connection response frame transmitted from the secondary station The frame exchange is performed by adding a field that means the number, and the optimum number of frames is calculated with reference to the number of frames that can be received at one time by each station, and the number of frames is calculated according to the number of frames. Transfer of the transmission right.

According to the above configuration, since the transfer right is always transferred for each number of frames supported between the primary station and the secondary station, the frame according to the memory capacity mounted in each station Exchange can be done.

[0968] The communication system according to the present invention is a communication system in which communication data is divided into a plurality of non-restricted frames, and then communication data is communicated in units of frames between the primary station and the secondary station. In the above, the primary station and the secondary station communicate using a hierarchical communication protocol, and the primary station is configured to transmit the unrestricted frame in one specific communication protocol layer constituting the hierarchical structure. A serial number and a flag indicating whether to transfer the transmission right are added, and the secondary station determines whether to transfer the transmission right of the frame received from the primary station in the specific communication protocol layer. Is a flag indicating that the transmission right is to be transferred, the primary station is notified of the result of communication indicating whether or not there is an error or missing frame in the frames received so far. To.

[0969] According to the above configuration, it is possible to perform retransmission even in communication using a non-restrictive frame having no restriction on the window size, and it is also possible to carry out layers other than the above-mentioned specific communication protocol layer. Need to change the existing force!

[0970] Furthermore, when the secondary station detects an error or frame omission in the specific communication protocol layer, when notifying the primary station of the communication result, the serial number of the frame in which the error or data omission occurred is also set. It is characterized by notifying.

According to the above configuration, it is not necessary to reduce communication overhead and power consumption of the primary station, and it is not necessary to change existing power of layers other than the specific communication protocol layer.

[0972] Furthermore, when the primary station is notified in the specific communication protocol layer that there is an error or a missing frame from the secondary station, the primary station may receive the error or the missing frame from the secondary station. It is characterized by retransmitting the frame after the frame where there was an error. According to the above configuration, it is not necessary to reduce communication overhead and power consumption of the primary station, and it is not necessary to change existing power of layers other than the specific communication protocol layer.

[0974] Furthermore, the primary station is characterized by performing retransmission of the frame only once when receiving notification that there is an error or missing frame from the secondary station in the specific communication protocol layer. Do.

According to the above configuration, it is possible to reduce the power consumption associated with transmission, and it is necessary to change the existing power of the layers other than the specific communication protocol layer.

Furthermore, in the secondary station, when an error or a frame drop is detected in the specific communication protocol layer, reception processing of frames subsequent to a frame in which the error or the frame drop is detected is stopped. Do.

According to the above configuration, the secondary station can reduce power consumption without receiving unnecessary frames, and layers other than the above-mentioned specific communication protocol layer can be used I need to change it.

[0978] Furthermore, the secondary station is characterized in that, in the specific communication protocol layer, only the frame having a necessary error or missing frame is received from the frames retransmitted from the primary station. Do.

[0979] According to the above configuration, the secondary station can reduce power consumption without receiving unnecessary frames, and layers other than the above specific communication protocol layer can be used. I need to change it.

[0980] Furthermore, in the specific communication protocol layer, when connection is established, the connection request frame transmitted from the primary station and the connection response frame transmitted by the secondary station can be transmitted and received at one time of each station. A field meaning the number of frames is added and frame exchange is performed, and the optimum number of frames is calculated with reference to the number of frames that can be received at one time of the other station received by each station, and the transmission right is determined according to the number of frames. It is characterized by the delegation of

According to the above configuration, frame exchange can be performed according to the memory capacity mounted in each station, and layers other than the specific communication protocol layer can be changed from existing ones. There is no need to

Furthermore, at the primary station, in the specific communication protocol layer, the non-restrictive frame is added with a flag indicating whether the upper layer requests the response frame for the transmission frame, and the frame is transmitted. In the secondary station, in the specific communication protocol layer, a flag indicating whether the upper layer of the primary station of the frame received from the primary station requests a response frame to the transmission frame is not effective. If it means that a response frame is requested, the upper layer is notified to that effect, and when the upper layer completes the preparation of the response frame, the upper layer receives a response frame for the passed response frame. It is important to add information that means the result of communication whether or not an error or missing frame occurred in the frame received until that time, and generate a response frame and transmit it. To.

According to the above configuration, it is possible to exchange request frames and response frames in the communication protocol layer positioned in the upper layer of the specific communication protocol layer that performs retransmission management.

Furthermore, in the primary station, a flag indicating whether the upper layer requests the response frame to the transmission frame is added to the specific communication protocol layer to the non-restricted frame. The secondary station transmits a frame, and in the specific communication protocol layer, whether the upper layer of the primary station of the frame received from the primary station requests a response frame for the transmission frame, If the indicated flag indicates that a response frame is required, the upper layer is notified to that effect, and the result of the communication is whether an error or a missing frame has occurred in the previously received frame. A response frame is sent, and when the upper layer is ready for the response frame, the response frame from the upper layer is sent again.

According to the above configuration, in the specific communication protocol layer of the primary station, the response frame is prepared in the upper layer of the specific communication protocol layer of the secondary station and the force response frame is not returned. Meanwhile, it is possible to receive the above-mentioned specific communication protocol layer level response frame (that is, the upper layer response frame is not included). Thus, the specific communication protocol layer of the primary station can know whether or not the secondary station has successfully received the frame before the response frame from the upper layer is sent back. Preparations for the next data transfer can be made in advance. [0986] The transmitting device according to the present invention is a transmitting device for transmitting communication data to the receiving station in frame units after dividing communication data into a plurality of non-restricting frames. A serial number adding means for giving a serial number, and a transmission right transfer flag giving means for giving a flag indicating whether or not to transfer the transmission right to the non-restricted frame.

[0987] Further, a communication method according to the present invention is a communication method of a transmitting apparatus for transmitting communication data to a receiving station in frame units after communication data is divided into a plurality of unrestricted frames. It is characterized by including a serial numbering step of giving a serial number of a frame to a non-restricted frame, and a transmission right assignment flag giving step of giving a flag indicating whether or not to transfer the transmission right to the non-restricted frame.

[0988] According to the above configuration, even in the communication using the non-restrictive frame without the limitation of the window size, the frame indicating whether the power of the receiving apparatus has been errored or the frame has been dropped is received. be able to. This makes it possible to retransmit unrestricted frames that have errors or dropped frames.

[0989] Further, the receiving device according to the present invention is a flag indicating whether to transfer the transmission right of the frame received from the transmitting device to the receiving device that receives communication data from the transmitting device. Response frame generation means for generating a response frame indicating whether an error or missing frame has occurred in the frames received so far, and the response frame generation means And sending means for sending a response frame to the sending device.

[0990] Further, a communication method according to the present invention is a communication method of a receiving device that receives communication data from the transmitting device, and indicates whether or not to transfer the transmission right of the frame received from the transmitting device. When the flag indicates the transfer of transmission right, the response frame generation step of generating a response frame indicating whether an error or missing frame has occurred in the frame received so far, and the response frame generation means Transmitting a response frame to the transmitting device.

[0991] According to the above configuration, even when a non-restrictive frame without a restriction on the window size is received, it is possible to transmit a frame indicating whether or not there is an error or a missing frame. it can. This makes it possible to retransmit an error-free non-restricted frame.

[0992] Further, a communication program for operating the primary station provided in the communication system according to the present invention is a computer program for executing a data communication process performed by the computer at the primary station.

According to the above configuration, the computer can operate the primary station provided in the communication system by executing the data communication process performed by the primary station.

Further, a communication program for operating the secondary station provided in the communication system according to the present invention is a computer program for executing a data communication process performed by the computer at the secondary station.

According to the above configuration, the secondary station included in the communication system can be operated by executing the data communication process performed by the secondary station using a computer.

[0996] Further, a recording medium according to the present invention may be a computer readable recording of a communication program for operating a primary station included in the communication system or a communication program for operating a secondary station included in the communication system. It is a recording medium.

According to the above configuration, the data communication processing performed by the primary station or the data communication processing performed by the secondary station can be realized on the computer by the communication program read out from the recording medium power. it can.

The present invention can be variously modified within the scope of the claims which are not limited to the above-described embodiments, and the technical means disclosed in the different embodiments may be combined as appropriate. The resulting embodiments are also included in the technical scope of the present invention.

[0999] The specific embodiments or examples made in the section of the detailed description of the invention reveal the technical contents of the present invention, and the invention is limited to such specific examples. Thus, the present invention can be variously modified and implemented within the spirit of the present invention and the scope of claims described below, which should not be construed in a narrow sense.

Industrial Applicability

[1000] The communication system, transmitting apparatus, receiving apparatus, communication method, communication program and recording medium of the present invention shorten the time required for data transfer with high reliability in data transfer. Therefore, the transmission function of the communication system according to the present invention can be applied to, for example, mobile phones, PDAs, personal computers, etc., while the reception function of the communication system according to the present invention can be The present invention can be applied to recording apparatuses such as AV equipment, printers, DVD recorders, HDD recorders, personal computers, and the like. Further, the communication system of the present invention can be applied to infrared communication conforming to IrDA.

Claims

The scope of the claims

[1] A communication device for collectively transmitting data without delegating the transmission right according to a communication method in which the number of frames that can be transmitted at one time is not limited.

Transmission frame generation means for dividing transmission data to be transmitted collectively and generating transmission frames;

Serial number generation means for giving a serial number to the transmission frame;

Batch transmission final flag generation means for setting a batch transmission final flag indicating the final transmission frame of the batch transmission data in the final transmission frame of the batch transmission data;

A communication unit for transmitting the transmission frame.

[2] Received frame analysis means for extracting the received frame strength and error-free flag and serial number;

Error-free flag analysis means for analyzing the above-mentioned error-free flag to determine the presence or absence of an error;

The communication device according to claim 1, further comprising: control means for retransmitting a transmission frame corresponding to the serial number when the error free flag indicates that there is an error.

[3] When one transmission data is divided into a plurality of batch transmission data and transmitted, a data final flag indicating that it is the last transmission frame of transmission data is set in the final transmission frame of the transmission data. The communication device according to claim 2, further comprising: data final flag generation means.

[4] The communication device according to any one of claims 1 to 3, wherein the communication method is communication using an unnumbered information (UI) frame of IrLAP (Infrared Link Access Protocol).

[5] The above-mentioned transmission frame includes at least a part of a PUT command or a final PUT command or a final PUT command of Object Exchange Protocol (OBEX), wherein claims 1 to 4 are characterized. A communication device according to any one of the items.

[6] Transmission right is delegated according to a communication method in which there is no limit on the number of frames that can be transmitted at one time. Communication equipment that collectively receives data without

Serial number analysis means for analyzing the serial number included in the received frame to determine whether there is an error in the serial number;

When the batch transmission final flag included in the reception frame indicates that the reception frame is the final transmission frame of batch transmission data divided into a plurality of transmission frames by the transmitter and collectively transmitted, the serial number Transmission frame generation means for generating a transmission frame including an error free flag set to indicate that there is an error and a serial number at the time of error occurrence, when an analysis means detects an error in a received frame received so far;

A communication unit for transmitting the transmission frame.

[7] A communication device that collectively receives data without delegating the transmission right according to a communication method in which the number of frames that can be transmitted at one time is not limited.

An error detection unit for determining whether or not there is an error in the received frame received and the batch transmission final flag included in the received frame are divided into a plurality of transmission frames by the transmitter and the batch transmission is performed. When the last transmission frame of batch transmission data is indicated, the above error detection means indicates the presence or absence of an error depending on whether the error has been detected in the reception frame received so far. Transmission frame generation means for generating a transmission frame including the error-free flag set as

A communication unit for transmitting the transmission frame.

[8] The communication device according to claim 6 or 7, wherein the communication method is communication using an unnumbered information (UI) frame of IrLAP (Infrared Link Access Protocol).

[9] The communication device according to any one of claims 6 to 8, wherein the transmission frame includes part or all of SUCCESS responses of OBEX (Object Exchange Protocol).

[10] Transfer the transmission right according to a communication method that does not limit the number of frames that can be transmitted at one time. Communication method for batch transmission of data without

Generate batch transmission frame by dividing batch transmission data to be sent collectively

Assign a serial number to the above transmission frame,

In the final transmission frame of the batch transmission data, set the batch transmission final flag indicating that it is the final transmission frame of the batch transmission data, and

A communication method characterized by transmitting the transmission frame.

[11] A communication method for collectively receiving data according to a communication method in which the number of frames that can be transmitted at one time is not limited, without transferring the transmission right.

The serial number included in the received frame is analyzed to determine whether there is an error in the serial number,

When the batch transmission final flag included in the reception frame indicates that the reception frame is the final transmission frame of batch transmission data divided into a plurality of transmission frames by the transmitter and collectively transmitted, If an error is detected in the received frame received, the transmission frame including the no error flag set to indicate that there is an error and the serial number at the time the error occurred is generated,

A communication method characterized by transmitting the transmission frame.

[12] The communication device according to claim 1;

A communication system comprising: the communication device according to claim 6.

[13] A communication device for transmitting an object using the object exchange protocol OBEX (OBject EXchange protocol),

A communication apparatus comprising: an OBEX layer processing unit that transmits an OBEX command following transmission of an OBEX command and then receiving an OBEX response from a receiver.

[14] A communication method for transmitting an object using an object exchange protocol OBEX (OBject EXchange protocol),

A communication method comprising: transmitting an OBEX command; and transmitting the next OBEX command without receiving an OBEX response from a receiver.

[15] A communication device for transmitting objects using the object exchange protocol OBEX (OBject EXchange protocol), At the end of OBEX! ヽ Only after sending a Put command, it is characterized by including an OBEX layer processing unit that transmits the last Put command or the last Put command that is not the next OBEX response to receive the OBEX response from the receiver. Communication equipment to be.

[16] A communication method for transmitting an object using the object exchange protocol OBEX (OBject EXchange protocol),

A communication method characterized by transmitting a non-final Put command or a final Put command following reception of an OBEX response from a receiver only after transmitting a Put command.

[17] A communication device that uses the object exchange protocol OBEX (OBject EXchange protocol), and the transmitter also receives an object outside the object,

A communication device comprising: an OBEX layer processing unit that does not always transmit an OBEX response after receiving an OBEX command.

[18] A communication method for receiving a transmitter device using an object exchange protocol OBEX (OBject EXchange protocol),

A communication method characterized in that an OBEX response is not always transmitted after an OBEX command is received.

[19] A communication device that uses the object exchange protocol OBEX (OBject EXchange protocol) to receive the outside of an object as a transmitter.

A communication device comprising: an OBEX layer processing unit that does not transmit an OBEX response when receiving a Put command, but transmits an OBEX response when receiving a final Put command.

[20] A communication method for receiving a transmitter power object using an object exchange protocol OBEX (OBject EXchange protocol),

A communication method characterized by not transmitting the OBEX response when receiving the Put command at the end of the OBEX, and transmitting the response of the OBEX when receiving the final Put command.

[21] A communication program for operating the communication device according to any one of claims 1 to 8, 13, 15, 17, 19. A communication program for causing a computer to function as the above-described sections. Gram.

[22] A communication circuit for operating the communication device according to any one of claims 1 to 8, 13, 15, 17, and 19. The communication circuit which functions as each of the above-mentioned sections.

[23] A mobile phone equipped with the communication device according to any one of claims 1 to 8, 13, 15, 17, and 19, and performing communication by the communication device.

[24] A display device equipped with the communication device according to any one of claims 6 to 8, 17 and 19, and displaying based on data received by the communication device.

[25] A printing apparatus equipped with the communication device according to any one of claims 6 to 8, 17 and 19, and printing based on data received by the communication device.

[26] A recording apparatus mounted with the communication device according to any one of claims 6 to 8, 17 and 19 and recording data received by the communication device.